 Thus, the late 13th century Wijbergen armorial shows the coat of arms of the Wallachian ruler Litovoi as consisting of a shield of ten vertically alternating gold-and-red bands, which were the colors of the coat of arms of the Second Bulgarian Empire, of which Wallachia was part.The same two colors, gules and or, also appeared on the late 15th century flag and coat of arms of Moldavia, during the reign of Stephen the Great .Then, from the late 16th century until the mid-17th century, the historical coat of arms of Transylvania gradually developed as a shield party per fess, consisting of a black eagle on blue background in the upper field, a dividing red band in the middle, and seven red towers on golden background in the lower field.