From a Dominican antiphonary
Tempera and ink on parchment
3 1/8 x 2 13/16 in. (7.9 x 7.1 cm)
Gift of Dr. Bashford Dean, 1923 (23.21.2)
Saint Peter Martyr, a hero of the Dominican order who was murdered by heretics in 1253, was named a saint within two weeks! When the Dominicans established their liturgy three years later, the feast of Saint Peter Martyr was an integral part of it.