In most Scottish burghs there was usually only one parish church, in contrast to English towns where churches and parishes tended to proliferate. As the doctrine of Purgatory gained importance in the late Middle Ages, the number of chapelries, priests, and masses for the dead prayed within them, designed to speed the passage of souls to Heaven, grew rapidly. The number of altars dedicated to saints, who could intercede in this process, also increased dramatically. St. Mary's in Dundee had perhaps 48 such altars and St Giles' in Edinburgh more than 50. The number of saints celebrated in Scotland also proliferated, with about 90 being added to the missal used in St Nicholas church in Aberdeen. New cults of devotion related to Jesus and the Virgin Mary began to reach Scotland in the fifteenth century, including the Five Wounds, the Holy Blood, and the Holy Name of Jesus. New religious feasts arose, including celebrations of the Presentation, the Visitation, and Mary of the Snows.