Bralewski, Sławomir, and Katarzyna Gucio. “The Porphyry Column in Constantinople and Тhe Relics of the True Cross”. Studia Ceranea 1 (December 30, 2011): 87–100. Accessed May 4, 2024. https://czasopisma.uni.lodz.pl/sceranea/article/view/5535.