 In the 13th century, some port cities were controlled by the Venetians and by the Genovese.The Crimean interior was much less stable, enduring a long series of conquests and invasions; by the early medieval period it had been settled by Scythians (Scytho-Cimmerians), Tauri, Greeks, Romans, Goths, Huns, Bulgars, Kipchaks and Khazars.In the medieval period, it was acquired partly by Kievan Rus', but fell to the Mongol invasions as part of the Golden Horde.