Demetrius I of Georgia

Demetrius I (c. 1093–1156), eldest son of David IV the Builder, ruled Georgia in 1125–1154 and again from 1155. As king he raided Ganja in 1139, carrying its iron gate to Gelati Monastery, and captured Emir Saltuk II at Ani in 1154.

Deposed by his son David V and tonsured as Damian, he returned after David's sudden death. He wrote the hymn Thou Art a Vineyard and is venerated as a saint.