Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
The Liturgical Year by Dom Guéranger.
Stories of the Saints for Children Second Series by Mary Seymour.
Victories of the Martyrs by Saint Alphonsus Liguori.
Art & Architecture
The Shrine to Saints Quiricus and Julitta in the Chapel of Theodotus in the church of Santa Maria Antiqua in Rome (background – video introducing the church – video of the chapel, in Italian – extensive photo gallery, and another extensive photo gallery)