The idea came about because of the political and ecclesiastical prominence of these five sees, but the concept of their universal and exclusive authority was firmly tied to the administrative structure of the Roman Empire. The pentarchy was first legally expressed in the legislation of Emperor Justinian I, particularly in Novella 131. The Quinisext Council of 692 gave it formal recognition and ranked the sees in order of preeminence, but its organization remained dependent on the emperor, as when Leo the Isaurian altered the boundary of patriarchal jurisdiction between Rome and Constantinople.[4][5] Especially following Quinisext, the pentarchy was at least philosophically accepted in Eastern Orthodoxy, but generally not in the West, which rejected the Council, and the concept of the pentarchy.[6]