Three other days, _i.e._ St Remigius, St Maurice, and St Martin, were not exempt from servile work.[56] This arrangement differs from the preceding, inasmuch as it includes all the Apostles, while the other mentions only SS. Peter and Paul, and St Andrew. The festivals of the Apostles are also absent from the list given by the Council of Mainz in 809. The Council of Mainz in 813, and the statutes of Bishop Rudolph of Bourges and Bishop Walter of Orleans in the same century, prescribe eight days for the festival of Pentecost, as well as for Easter, and mention in addition the Nativity of our Lady and St Remigius as festivals.[57] The Council of Ingelheim in 948 retained the Easter octave but reduced the festival of Pentecost to four days, which were finally reduced to three by the Council of Constance.[58] A few additions to these festivals are given in the collections of canons put out at a subsequent period by Burchard of Worms[59] and Ivo of Chartres.[60] The Canon Law contains two lists of festivals, the one representing the state of things in the twelfth, the other that in the thirteenth century. The former, in the decretal of Gratian,[61] enumerates all the Sundays in the year from Vespers to Vespers, and then, throughout the year, the following days are exempt from servile work: Christmas and the three following days, St Silvester, _Octava Domini_, _Theophania_, _Purificatio S. Mariæ_, Easter and the entire Easter week, the three Rogation days, the Ascension, the days of Pentecost (probably three), St John the Baptist’s Day, all the Apostles, St Lawrence, _Assumptio_ and _Nativitas B.M.V._, the Dedication of the Church, St Michael and All Saints, and, finally, the festivals approved by the bishop of the diocese. This list exhibits a further increase on its predecessors.