sentences:  Saint Clement used his newly created church as a liturgical building and a place for teaching his disciples his revision of the Glagolitic alphabet, known as the Cyrillic script.Clement personally built a crypt inside the church in which he was buried after his death in 916; his tomb still exists today.In the 15th century, Ottoman Turks converted the church into a mosque but during the beginning of the 16th century allowed ruined monasteries and churches to be restored, therefore, so was Saint Clement's church.