
Saint Didacus of Alcalá (c. 1400–1463), also known as Diego de San Nicolás, was a Spanish Franciscan lay brother celebrated for his humility, charity, and deep spirituality. Born in San Nicolás del Puerto, Andalusia, he initially lived as a hermit before joining the Franciscan Order. Didacus served as a missionary in the Canary Islands, where he was appointed guardian of the Franciscan community on Fuerteventura, an exceptional role for a lay brother. In 1450, he traveled to Rome for the canonization of Saint Bernardine of Siena and remained there to care for friars afflicted by an epidemic, reportedly performing miraculous healings. After returning to Spain, he spent his remaining years in contemplation and service, passing away in Alcalá de Henares on November 12, 1463. Canonized in 1588, he is the patron saint of the city of San Diego, California, which was named in his honor.
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You're listening to a podcast on Catholic Saints. This podcast is produced by the Augustine Institute, an apostolate helping Catholics understand, live, and share their faith. Hello, everyone, and welcome to the Catholic Saints Podcast. My name is Taylor Kemp. I am the vice president of content here at the Augustine Institute, and with me today is Dr. Scott Heffelfinger, a faculty member and our director of content development. Scott, welcome to Catholic Saints.
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Thank you for having me.
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It's great to have you on. Today we are talking about St. Did who. Up until last week when you told me about doing an episode on Saint Did, I don't think I had ever heard of him, nor do I know anything about him. So I am excited to learn about Saint Didicus. When is his feast day?
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So his Feast Day is November 7th. And, you know, with the feast day approaching and realizing I also didn't know hardly anything about St. John, started to look into it and found some fun, fun things as usual. I mean, some wonderful things, but then also some fun tidbits that we can talk about.
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Fun and wonderful. The saints are fun and wonderful. I think they'd appreciate that, that nomenclature. So, okay, so who is Saint Dedicus? Where, where, where to begin?
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Yeah. Okay, so he's, he's born around the year 1400 in kind of southwest Spain, getting close to Portugal. It's San Nicolas, Spain. And he's born into a pious family. Okay. So he's got like this, this good formation and, you know, they must have been really pious because he, as a child, he starts to live the. A medical life. He becomes, Wow, a child hermit. Now, okay, I don't claim to have sort of like encyclopedic knowledge of all the saints lives, but this is the first time that I've come across. I have heard that at hermit there are many, like, very holy children. Saints.
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Yes.
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But to.
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Actually, I have never heard that.
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I mean, so that's pretty common.
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This can't be common.
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I mean, no, I don't think so.
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This is particular. This is. That's quite unique.
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Imagine being. I mean, we're both parents. Like, imagine being a parent and your.
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Child'S kind of like, I'm going out, I'm going in the desert. Can you define for us, when you say Aram. Medical.
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Yeah.
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Life. What do you mean by that?
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Yes, I mean, usually it, it designates a life removed from society. So kind of out into the desert, although it could be a mountain or, you know, whatever it is. So away from others with, like, in relative austerity. So penance and Prayer. It's devoted to kind of solitude, penance and prayer. I mean, that's what I wanted as a child. Didn't you?
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No, I didn't want that. I want that more now than when I was a kid. And I don't know if I would want that for my. I want holiness for my kids, but I don't want them going off to the desert.
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So is it interesting how parents must we want holiness but according to the form that we. I know, sort of give it.
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We were. I mean, this. We're, we're getting. Sorry, listeners, we're getting slightly tangential. My wife and I were just having this conversation of like, I want holiness on my terms for ourselves, yes, for our kids. It's such a, a normal human temptation, but it's one in which like, just detachment to even our own vision of how we attain to holiness is necessary to allow God to sanctify us. So yeah, child hermits, maybe listeners out there, maybe your kids are called to that.
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So he's a child hermit. He actually starts being directed by another, like spiritually directed by another hermit priest. And after some years of this, I don't think it's super long, but he feels a call to the religious life, okay, not super surprising. And he enters a kind of reformed branch of the Franciscans, the Order of Friars Minor. Nowadays, we'll see ofm after, you know, Father so and so's name or whatever. He enters as a lay brother, okay. And he works at the trades to kind of support his community. So I think there's an interesting lesson here about the importance of manual labor, the trades. We can maybe come back to that. So he's in this community. He ends up getting sent about a thousand miles overseas to the Canary Islands, so off the northwestern coast of Africa to do missionary work. So he becomes a missionary. He's spreading the gospel to the native people there. And because of his sort of diligence and charity and basically his effectiveness, it leads him to be placed as kind of the superior of the Franciscans on one of the islands, the island of Fuerteventura. This is kind of unusual because normally a lay brother would not be able to be named to this position, but he has such. Yeah, he's got such a reputation for holiness already and kind of again, effectiveness that he's put in this position. He becomes a pretty staunch defender of the indigenous people in a variety of ways. And not all of the kind of political and perhaps religious leaders are happy with this. And so he actually is then brought back to Spain after a couple of years. So that kind of ends his missionary work and the next phase, he's, he's sent to Rome for the beatification or canonization of a, of a well known Franciscan. An epidemic breaks out while he's there. And as so many of the saints, you know, he kind of cares for him in their sickness. He has healing gifts, there are miraculous healings attributed to him. And so he has this kind of healing phase for a few years in Rome. That was a trip that got very much extended by, you know, this, this epidemic of illness there. And he kind of goes back then to Spain and just lives out the rest of his life in a friar in Alcala doing penance in solitude and, you know, very lofty contemplative prayer. And at the age of 63, he dies in 1463. He's canonized a little over a century later. He's the first Franciscan lay brother. Yeah, relatively quick first lay brother to be canonized. And he's the patron saint of Franciscan brothers and Franciscan laity. So like third order Franciscans. So that's kind of the span of his life. And yeah, I mean really, really some neat things. I mean, one of the things that was striking to me so I grew up in Southern California, not in San Diego, a little north on the coast. But I realized in researching this saint and trying to, you know, befriend him a little more as his feast day approaches, that San Diego, California is named after him actually. So, yeah, so usually Diego in English would be James or Jacob, but it's. So they, at a certain point, which sailor was it came in and they celebrated the first mass on land on the feast day of Saint Didicus. And so he names it after him, the Bay of San Diego. And that's in 1602. And so then when the missionaries come over, Father Junipero Serra, the first mission that they establish in California is named, you know, in tandem with the bay there, Mission San Diego de Alcala, which is Saint Didicus. So kind of a neat connection to my home state ultimately that I didn't know at all. I just assumed that it was, you know, a different Diego, a different.
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Yeah, it's true. And you just don't hear of Saint Didicus.
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No, he's not that well known all that much.
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Yeah, so I mean, he, he, it's an interesting life. I'm always fascinated by, you know, the saints that we have. There's. Well, I'll just restate this. There seems to be a lot of these saints that we have that are connected to orders, but they're actually lay.
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Yeah.
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Oblates or, you know, third order, whatever it may be, how many of those there are. And I don't know if that's because, you know, within my Catholic life, I was being an adult convert there, I didn't have, like, all that much of an awareness that that was a thing. And so, yeah, it's always fascinating to find the. Some of the things that kind of stick out to me, besides the fact that he was a child hermit, which is obviously particularly unique. You always kind of wonder, you know, especially because that is more of an extreme.
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Yeah.
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Of what an interesting call that the Lord must have clearly put on his heart and then also prepared him. Like whenever you see these kind of extraordinary circumstances, which I would call a child going out to live a hermit, like, life is. Is extraordinary. Like, what an interesting thing. Like what was the Lord preparing him or her for? And then in this example, him. And then just recognizing, you see, some of these classic marks of holiness, love of the poor. I'm imagining, especially as he went and kind of served the indigenous peoples and then was called back. That was probably a challenge, I'm assuming. Right, right. For someone who has, you know, the love of God burning in their heart, recognizing they were called back, and then submitting to their obedience of whatever superior there are. And then really, the place of penance in the spiritual life, of really trying to live out in concrete ways the detachment that we all need from the things of this world in order to seek, pursue, and attain God in a fuller sense. So as you were talking, I was like, yeah, this just follows, like, a lot of the normal kind of trappings, marks of holiness of God's saints.
B
Yeah. I mean, it's interesting, the point you made about. Just to go back to the thing that's fascinating us here, the child hermit, you said this is kind of an unusual extreme even, and we have to sort of think carefully about that. I think when I teach in our graduate school here, there's a line that I'll say to my students sometimes, and that is we shouldn't do what the saints do until we see as the saints see. And that is kind of what your point is, that God prepared this child, obviously, in a certain particular way and prepared him for this certain particular mode of life. And I think this can be generalized, you know, because sometimes the saints take on fairly extreme penances. For example, we see that we're kind of like, wow, that's, you know, I don't know. And the thing is, it's hard for us to understand the degree to which the saints see their own sinfulness, for example, or understand God's particular call. And until it would not make sense for me to take on extreme penances because, you know, the sad truth that I asked the Lord to rectify in my life, but the sad truth is I don't take my sins as seriously as the saints took their sins. And so it would be inappropriate for me to do some of these things. So until we see like the saints see, we shouldn't do exactly as the saints do.
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And to kind of understand suffering to like. Which is the consequence of it. Right. To understand suffering in the way they. That they do. The redemptive nature of it that. Agreed, like, introspectively, I'm like, yeah, I couldn't suffer like they do and not break or give up hope because I'm not where they are. I'm reading through some works of St. John of the Cross, who had a very hard life and was mistreated by his. His brothers for an extended period of time, like, brutally. And I'm reading this and I'm like, I could never do not. I, like, couldn't do it. Can't imagine it. Like, unbelievable amount of suffering psychologically and physically. And then coming to terms with. But. But John, St. John of the Cross, he understood what he was going through is participating in the redemption of the world, which is the right understanding of suffering. And that the Lord had him ready to receive that in his own way. And that. Like, yeah, when you hear these extreme penances, these are not things that we called to seek out unless we are called to seek them out. And that there is so much that goes into that in the preparatory phase, so we don't have to. Yeah, but it's a difficult thing to grapple with because you'll read these lies of the saints, you're like, oh, my goodness. Like, these are. These are at times unbelievably challenging stories that you read and recognizing it's okay, I'm not there and I aspire to be there, but the Lord will. The Lord sanctifies us in his way, not in the. Like. The saints are all perfectly unique. We are all unique. And the Lord works with us in unique ways.
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Yeah, absolutely.
A
Yeah. So, alrighty. Saint Didachus heard his life. Scott, were there particular things that you think we can remember about him today? Or especially certain things about his life or witness of holiness that we can practically kind of take in into our lives today?
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Yeah, I mean, as I was sort of, you know, praying with this saint and reflecting on him. I'm a theologian at heart, and I have a theologian's mind. And what really stood out to me was how here is a saint, as with so many of them. And it was kind of that pattern that struck me. A saint who did a lot of manual labor. He worked in the trades. I mentioned that early on in his life, but then also kind of tending to the sick. So just, I don't know the value of manual labor today and how important it is. I mean, maybe for me, especially as, you know, kind of pursuing an intellectual life to kind of balance that. But I do think there's something for all of us that it's important for natural reasons to kind of stay connected with real things and work with our hands, but also for supernatural reasons, of, you know, just tending to, like, ordinary work. We can sometimes think like, well, I'm. You know, my time is worth so much more, and maybe I shouldn't bother with the menial things. And it's fine to sort of outsource some things. We all do it. But maybe not everything. Like, maybe it's good to be doing some. Some menial manual. Maybe it's just good for us as human beings and as Christians. So that was kind of a takeaway that sat with me.
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I like that.
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There's also another. There's a beautiful story that I didn't mention in his life. He falls sick towards the end of his life, and he is said to have died singing a chant about the cross. And it's kind of an established chant in the church. And this, to me, it was a beautiful thing of just thinking about how I've been blessed through certain experiences. I've had to have become familiar with some of the church's venerable chants. And I've tried to hand that on to my children. And I do think it's so beautiful and important to just have not only the church's prayers. I mean, above all the church's prayers, but even some of her chants and sacred music just kind of written into our soul so that, you know, how beautiful is it in his story? And how beautiful would it be in my life or in another's life, like, to die with the words of a beautiful sacred hymn, like, on my lips, like, oh, it'd be so wonderful.
A
Yeah, I like that. And I've always. I love that about some of the churches, what we would consider more rote prayers is recognizing the value of some of these things that the. The church provides, whether it's chants, hymns, or, or prayers is recognizing, like, there's just certain moments in our life, like when we would be dying or in extreme sorrow or joy where you're like, I don't want to with my own.
B
Words, or I can't. You might not even have. I mean, I've been in situations where there's just so much going on or maybe I'm so consumed or worried about something that, you know, I can sort of get out a very, very simple, spontaneous prayer which is, you know, like, lord, help me. But it's so beautiful to have these ropes to lean on.
A
And it's such a gift. I mean, I, the number of times I have been so I'm just like, lord, thank you so much for the Our Father. Because there's just some certain moments where you're like, I can't pray. Like you're emotionally in a, in a comprom place or mentally or just exhausted. But. And you need, but you need something and that these things have been given us.
B
So.
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I agree. For, for something like a really beautiful chant that you're assuming has gone through kind of the refining fires of, you know, depth and beauty that. And then to have those as gifts is always been. Yeah, I agree. It's a, it's a great thing to have. So. Scott, thanks. Any, any, you know, parting. Parting things to add for, for listeners before we close out.
B
Maybe just how fun it is to discover some of these relatively unknown saints. Like we both said, we didn't know about this saint really until this feast day is approaching and it's kind of like, oh, maybe be worth learning something. And it sure is, you know, and all the saints are like that. What a treasure we have in the saints. So Saint Didicus just kind of, you know, reminds us of that in some great ways.
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I couldn't agree more. Well, thanks everybody out there for listening to Catholic Saints, where we hope to bring glory to God through his heroic men and women, witnesses of holiness and virtue. And if you are listening out there, we are excited to offer these podcasts for free. We do have a giving society called the Mission Circle, which you can find on mission circle.org if you sign up and join. It's always helpful for us. It. It allows us to keep making things like this available. So thanks so much for joining us and God bless.
Produced by: Augustine Institute
Host: Taylor Kemp
Guest: Dr. Scott Heffelfinger
Date: November 13, 2025
Episode Focus: Exploring the life, spirituality, and legacy of the little-known St. Didicus
This episode introduces listeners to St. Didicus, a humble yet remarkable 15th-century Spanish Franciscan. Despite being almost unknown—even to the hosts—St. Didicus' life demonstrates a unique path to holiness, blending solitude, manual labor, missionary work, and contemplative prayer. Taylor Kemp and Dr. Scott Heffelfinger use humor and warmth to draw out both spiritual lessons and interesting historical connections, notably St. Didicus’ surprising link to San Diego, California.
Early Life and Unusual Calling
Religious Life and Manual Labor
Mission to the Canary Islands
Miraculous Healing and Final Years
Canonization and Patronage
Extraordinary and Ordinary Paths
Cautions on Imitation
Value of Manual Labor
Sanctifying the Ordinary
Dying with Sacred Song
On Child Hermits:
“Imagine being… a parent and your child’s kind of like, ‘I’m going out, I’m going in the desert.’”
– Taylor (02:06)
On Spiritual Detachment:
“…just detachment to even our own vision of how we attain to holiness is necessary to allow God to sanctify us.”
– Taylor (03:02)
On Once-Unknown Saints:
“Maybe just how fun it is to discover some of these relatively unknown saints… What a treasure we have in the saints.”
– Scott (16:47)
Taylor Kemp and Dr. Scott Heffelfinger highlight St. Didicus as an unexpected model of holiness—a blend of the extraordinary and the humble. They urge listeners to discover lesser-known saints, appreciate the sanctity of ordinary work, and trust God’s unique path for each of us. Through Didicus’ story, the podcast models both admiration and gentle realism about the journey to sanctity.