In 1023, Archbishop Aribo of Mainz convened a synod at Salegunstadt with several bishops and abbots to resolve discrepancies in ecclesiastical customs and promote harmony within the Church. The council established rules on abstinence from meat and dairy during specified periods, regulations for the four seasonal fasts, prohibitions on marriage during certain liturgical seasons, and restrictions on priests celebrating Mass after drinking or exceeding three Masses per day. It also forbade carrying swords into churches (except by royalty), improper use of the corporal to extinguish fires, and disorderly conduct in church spaces. The synod addressed issues of consanguinity in marriage, limited certain liturgical practices, and forbade laity from erecting buildings in church atriums, all aimed at maintaining ecclesiastical discipline and unity.