Processions often take place before masses on Sundays and important feasts. The procession, accompanied with chants, may be made to another church (a station), for readings and prayers. The processions' hymns are sometimes assembled in a book called a processional. Made for an urban church dedicated to St Mary and with dependent suburban churches, this one may have been for Salisbury Cathedral, but one of its processions is adapted for the tradition (use) of Norwich and a procession with the relics of St Swithin suggests Winchester, too. The liturgy or services of a cathedral were complex, involving a number of processions. This diagram lays out the positions of acolytes, deacons, priests, bishops and archbishops for a station before the cross, probably a procession enacted on Saturdays throughout the summer. Although the cross is not shown in the diagram, the title (in red) identifies it as a diagram for "the station before the cross on Saturday ", and the hymn below, an antiphon, is 'O Crux Splendidior.'