Supersessionist theology is extensive in Catholic liturgy and literature. Gregorian chant evolved to fulfill various functions in the Roman Catholic liturgy. It was the only metrical hymn included in the Edwardian liturgy. It is an expression used in a prayer of the Christian liturgy. Virgin in the Liturgy of the Church. Outside of sermons during the celebration of the divine liturgy it was restricted from evangelizing. It was a royal ceremonial funeral including royal pageantry and Anglican funeral liturgy. Mary is one of the key themes of Orthodox liturgy and spirituality. Other prayers honouring Mary's immaculate conception are in use outside the formal liturgy. He served as a lector in the sacred liturgy. The three seasons are commemorated by special prayers in the Coptic Liturgy. They mark the end of the procession of the monstrance in Holy Thursday liturgy. The suggested changes intent was to achieve a greater correspondence between liturgy and Scripture. As such, it is still heard in churches where the Tridentine Latin liturgy is celebrated. In monasteries and cathedrals, celebration of the Liturgy of the Hours became more elaborate.