Stephen I, also known as Stephen the Great, was a ruler of the Principality of Moldavia in the 15th century. He is remembered for his military victories against the Ottoman Empire and his efforts to defend Moldavia from foreign invasions. Stephen I is considered a national hero in Romania and is known for his strategic leadership and his dedication to protecting his people. His legacy includes numerous churches and monasteries that he built, as well as his reputation as a defender of Christianity in Eastern Europe.