Medieval Bulgarian coinage are the coins minted by the Bulgarian Emperors during the Middle Ages at the time of the Second Bulgarian Empire. There is no evidence that coins were minted during the First Bulgarian Empire, and minting ceased after the fall of the Second Empire with Ottoman domination in 1396 or 1422. They were gold (perperi), silver (aspri), billon (coinage of silver and copper) and copper coins, all flat and hollow. The inscriptions were usually in Bulgarian language and rarely in Greek. Due to the limited space the inscriptions were abbreviated, often written with a few letters and special signs. Artistically, they continued the Byzantine numismatic tradition but the designs were often more schematic. The main means of expression were lines and dots. The Bulgarian coins had