Saint John of Cascia, also known as Saint John of Capistrano, was a Franciscan friar born in 1386 in Italy. He is best known for his role in the Catholic Church during the 15th century, particularly for his efforts in preaching and reforming the Franciscan order. He was a prominent figure in promoting the faith and was involved in various missions across Europe. He is often remembered for his dedication to the Crusades and his work in defending the Christian faith against the Ottoman Empire. Saint John of Cascia was canonized in 1690, and his feast day is celebrated on October 23. His legacy continues to inspire many within the Catholic Church.