Marko Krizin was a 17th-century Croatian Catholic priest, theologian, and missionary. Born in Križevci, he pursued advanced studies in Vienna and Graz before moving to Rome to study at the Pontifical Gregorian University. After his ordination, he served as a rector and canon under the Archbishop of Esztergom. His ministry eventually led him to the region of present-day Slovakia, where he became caught in the religious conflicts between Catholics and Calvinists. He is recognized as a martyr for refusing to renounce his faith during a period of intense political and religious unrest.