“Salvatore Olandese: Pierre Cuypers’ Archeological Committee and the Art-Theoretical Significance of the Catacomb Copies in Valkenburg”. Bulletin KNOB 119, no. 2 (August 23, 2020): 36–51. Accessed April 21, 2026. https://bulletin.knob.nl/index.php/knob/article/view/674.