Quinisextum, Concilium (Σύνοδος πενδεκτή', as a complement of the fifth and sixth, so-called, cecumenical councils, A.D. 555 and 680), was held at Constantinople in 692, and intended to complete the disciplinary measures proposed, but not completed, at the previous councils. The meetings of this council were held in a hall in the imperial palace called Trullus, and hence it received, also, the name of the Trullan Council. It was composed chiefly of Oriental bishops, and its canons were publicly received in all the churches within the territories of the Greek emperors. Although the Roman legates subscribed to the acts of this council, it was never recognised by the Romish Church nor bv its then ruling pope, Sergius I. This is due to the decisions of the council regarding the number of the apostolical canons, against enforced clerical celibacy, the rank of patriarchs, the fasting on Sabbath eves, the partaking of blood, etc. See Schaff, Ch. History; Milman, Hist. of Christianity; Butler, Ch. History, i, 359; Riddle, Hist. of the Papacy; Mosheim, Ecclesiastes Hist. vol. i; Lea, Celibacy.