6 May – Servant of God Demetrius Augustine Gallitzin

Modern Hagiography

Catholic Pioneers of America

Great Catholics in American History

American Catholic History – Prince Gallitzin: From Russian Prince to American Catholic Priest

Father Demetrius Gallitzin – A Royal Priesthood

Lives of the Catholic heroes and heroines of America

Life of Demetrius Augustine Gallitzin, prince and priest

A Memoir on the Life and Character of the Rev. Prince Demetrius A. de Gallitzin – audiobook & text

Writings

A Defence of Catholic Principles

A letter to a Protestant friend on the Holy Scriptures : being a continuation of the Defense of Catholic principles

Art & Architecture

Wikimedia Commons

Find a Grave, also

4 May – Blessed Richard Reynolds

Purportedly in the Church of Santa Brigida
The Book of Saints

Modern Hagiography

A Menology of England and Wales

Mementoes of the English Martyrs and Confessors for Every Day in the Year

The Angel of Syon: The Life and Martyrdom of Blessed Richard Reynolds, Martyred at Tyburn, May 4, 1535

Art & Architecture

Chapel of St Richard in the Santa Brigida a Campo de’ Fiori