See this free ebook:

• The Two Lovers of Heaven: Chrysanthus and Daria; A Drama of Early Christian Rome, by Pedro Calderon de la Barca, translated by Denis Florence Mac-Carthy (Dublin: John F. Fowler; London: John Camden Hotten, 1870). Available in various formats at Internet Archive, Open Library, and Project Gutenberg.

On the Feast of Saints Chrysanthus and Daria in the Extraordinary Form of the Roman Rite.