Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
Stories of the Saints for Children Second Series by Mary Seymour.
The lives of Saints Romanus and Lupicinus are available in a newer translation not in the public domain.
Art & Architecture
Medieval Religion Listserv – 2016 Dillon.
The Saints in Art by Joseph Maria von Radowitz.