International audience From the 12th century until the Council of Trent, local churches and regular orders determined their own liturgical uses with ever greater precision. They used ordinals and breviaries, which synthesized the prescriptions conceming the divine service, to promulgate, record and spread these continually evolving cultual customs. These books may be considered as the true legal codes of their uses, more than as sim ply the collections of synodal or capitular statutes. As a result of the Catholic Reformation and the foundation of the Roman Congregation of Rites in 1588, local churches, particularly cathedral chapters, were less and less entitled to their own liturgical rules.