Saint Theodore is a Christian martyr celebrated in both the Eastern Orthodox and Roman Catholic traditions. He is often associated with the early Christian period and is known for his steadfast faith during persecution. His feast day is observed on different dates, including February 8 in the Western Church and April 4 in the Eastern Church. In art, Saint Theodore is frequently depicted as a soldier, reflecting his military background. He is sometimes shown slaying a dragon, symbolizing the triumph of good over evil. His legacy is honored in various churches and through the veneration of relics attributed to him, particularly in regions like Constantinople and Russia.