Mircea, son of the Byzantine Princess Calinicha and son of Radu I Principe of Ungro-Valahia and Bulgaria, Despot and ruler of Vidin. Mircea took his father role to expand the territory of Wallachia southwards to the successor states of the Valahian-Bulgarian Tsardom. Mircea as his father had the title of Despot, and expanded Wallachia to the Black Sea, and had an Imperial double headed eagle.