Skip to content
Catholic Online Logo
Image of St. Casimir


Feastday: March 4

Patron of Poland and Lithuania

Birth: 1461

Death: 1484

Casimir grew up in a world where his life was not his own. As a prince of Poland, the second son of King Casimir IV and Elizabeth of Austria, his life was scheduled to cement his father's authority and increase Poland's power.

Casimir realized from an early age that his life belonged to someone else, but to a much higher King than his father. Despite pressure, humiliation, and rejection, he stood by that loyalty through his whole life.

Born the third of thirteen children in 1461, Casimir was committed to God from childhood. Some of that commitment was the result of a tutor, John Dlugosz, whose holiness encouraged Casimir on his own journey.

It may be hard for us to imagine royal luxury as a pressure. But for Casimir, the riches around him were temptations to forget his true loyalties. Rebelling against the rich, fashionable clothes he was expected to enjoy, he wore the plainest of clothes.

Rejecting even ordinary comforts, he slept little, spending his nights in prayer. And when he did sleep, he lay on the floor not on a royal bed. Even though he was a prince, many of those around him must have laughed and joked at his choices. Yet, in the face of any pressure, Casimir was always friendly and calm.

Though his father must have wondered about him, he must have seen and admired Casimir's strength. He showed that he misunderstood this strength when he sent Casimir as head of an army to take over the throne of Hungary at the request of some nobles there. Casimir felt the whole expedition was wrong but was convinced to go out of obedience to his father. He could not help but feel at every step that it was disobedient to his other Father. So when soldiers started deserting, he was only too glad to listen to the advice of his officers and turn back home. His feelings were confirmed when he discovered that Pope Sixtus IV had opposed the move.

His father, however, was furious at being deterred from his plans and banished Casimir to a castle in Dobzki, hoping that imprisonment would change Casimir's mind. Casimir's commitment to what he believed was right only grew stronger in his exile and he refused to cooperate with his father's plans any more despite the pressure to give in. He even rejected a marriage alliance his father tried to form. He participated in his true King's plans wholeheartedly by praying, studying, and helping the poor.

He died at the age of 23 in 1484 from lung disease. He was buried with his favorite song, a Latin hymn to Mary called "Omni die dic Mariae" which we know as "Daily, Daily Sing to Mary." Because of his love for the song, it is known as the Hymn of St. Casimir though he didn't write it.

Casimir is patron saint of Poland and Lithuania.

In His Footsteps:

Where do your loyalties lie? Is there a part of your life where you feel your loyalties divided and feel pressure to follow worldly commitment? Today choose the action that best serves Christ the King.


Saint Casimir, help us to remember that our true King is Jesus Christ and always serve him with joy and love. Help us to turn to our true Father for guidance and protection. Amen

Copyright 1996-2000 Terry Matz. All Rights Reserved.

More about St. Casimir from Wikipedia

St. Casimir Comments

More Saints

Browse Saints by Category

Popular Saints




Image of St. Philomena

St. Philomena

Little is known of her life, and the information was received by private revelation from her. Martyred at about age 14 in the early days of the Church. In 1802 the remains of a young ... continue reading


Image of St. Gertrude the Great

St. Gertrude the Great

St. Gertrude the Great is invoked for souls in purgatory and for living sinners. Our Lord told St. Gertrude that the following prayer would release 1000 souls from purgatory each time it is ... continue reading


Image of St. Barbara

St. Barbara

Barbara lived in the 4th century and brought up as a heathen. A tyrannical father, Dioscorus, had kept her jealously secluded in a lonely tower which he had built for that purpose. Here, in ... continue reading

All Popular Saints

Saint of the Day

Image of St. Bruno

St. Bruno

Bruno was born in Cologne of the prominent Hartenfaust family. He studied at the Cathedral school at Rheims, and on his return to Cologne about 1055, was ordained and became a Canon at St. ... continue reading

More Saint of the Day

Saint of the Day by E-Mail

Saint of the Day newsletter icon

Learn about the lives of the saints and other saint resources, including a calendar, over 5,000 saint biographies, our most popular saints, and a list of patron saints. 7 days / week. See Sample


Female Saints

Image of St. Kateri Tekakwitha

St. Kateri Tekakwitha

Saint Kateri Tekakwitha, Virgin, was canonized on 10/21/2012 by Pope Benedict XVI. Kateri was born near the town of Auriesville, New York, in the year 1656, the daughter of a Mohawk warrior. She was four years old when her mother died of smallpox. The disease also ... continue reading

More Female Saints

Saint Calendar
Saint Feast Days
Saint Fun Facts


Image of St. Michael the Archangel

St. Michael the Archangel

St. Michael the Archangel - Feast day - September 29th The name Michael signifies "Who is like to God?" and was the warcry of the good angels in the battle fought in heaven against satan and his followers. Holy Scripture describes St. Michael as "one of the chief ... continue reading

Image of St. Gabriel, the Archangel

St. Gabriel, the Archangel

The name Gabriel means "man of God," or "God has shown himself mighty." It appears first in the prophesies of Daniel in the Old Testament. The angel announced to Daniel the prophecy of the seventy weeks. His name also occurs in the apocryphal book of Henoch. He was the ... continue reading

Saints Fun Facts

Saints Fun Facts for St. Marian

St. Marian

When St. Mamertinus was Abbot of the monastery which St. Germanus had founded at Auxerre, there came to him a young man called Marcian (also known as Marian), a fugitive from Bourges then occupied by ... continue reading

Saints Fun Facts for St. Lydwine

St. Lydwine

St. Lydwine is the patroness of sickness Lydwine of Schiedam was born at Schiedam, Holland, one of nine children of a working man. After an injury in her youth, she became bedridden and suffered the ... continue reading

Christian Saints & Heroes

Image of St. Therese of Lisieux

Jennifer Hartline: Trying to Learn Humility From St. Therese

By Jennifer Hartline

St. Therese helps me understand: "the splendor of the rose and the whiteness of the lily do not take away the perfume of the little violet or the delightful simplicity of the daisy.if all flowers wanted to be roses, nature would lose her springtime beauty, and the ... continue reading

More Christian Saints & Heroes


Newsletter Sign Up icon

Stay up to date with the latest news, information, and special offers

Subscribe to Catholic OnlineYouTube Channel

Daily Readings

Reading 1, Jonah 3:1-10
1 The word of Yahweh was addressed to Jonah a second ... Read More

Psalm, Psalms 130:1-2, 3-4, 7-8
1 [Song of Ascents] From the depths I call to you, ... Read More

Gospel, Luke 10:38-42
38 In the course of their journey he came to a ... Read More

Saint of the Day

Saint of the Day for October 6th, 2015 Image

St. Bruno
October 6: Bruno was born in Cologne of the prominent Hartenfaust family. ... Read More