This ruler’s construction projects were recounted in De Aedificiis (“day EYE-di-FIK-ee-ees”). This ruler’s marriage to a Miaphysite may have led him to condemn the Chalcedonian (10[1])(“KAL-suh-DON-ee-an”) Three-Chapters, sparking a feud with Pope Vigilius. In the Treaty of Eternal Peace, this ruler agreed to pay 11,000 pounds of gold (10[1])to Sassanid emperor Khosrau I (“CAUSE-row the first”). Under this ruler, a building was designed by Isidore (-5[1])of Miletus (-5[1])after its predecessor burned (-5[1])down during the Nika (10[1])Riots. This emperor (-5[1])reformed law in the Corpus (10[1])Juris Civilis, and sent Belisarius (10[1])to reconquer portions of the Western Roman (10[1])Empire. For 10 points, name this Byzantine Emperor, the husband of Theodora (10[1])and constructor of the Hagia Sophia. ■END■ (10[2])