Image credits

All images are public domain or CC0, from Wikimedia Commons.

• Giovanni Paolo Panini, Interior of Saint Peter's, Rome, c. 1754, NGA 50884, Giovanni Paolo Panini. CC0, via Wikimedia Commons.
• David Roberts - Church of the Holy Sepulchre, Jerusalem - 1927.103 - Cleveland Museum of Art, David Roberts. CC0, via Wikimedia Commons.
• The grotto of Notre Dame, Lourdes, Pyrenees, France-LCCN2001698648, Photochrom Print Collection. Public domain, via Wikimedia Commons.
• Primeira Missa na Capelinha, Unknown photographer. Public domain, via Wikimedia Commons.
• El Pórtico de la Gloria de la Catedral de Santiago de Compostela, 1849, Jenaro Pérez Villaamil, Palacio de la Moncloa, Madrid, Genaro Pérez Villaamil. Public domain, via Wikimedia Commons.
• The church, Czenstochow, Russia (i.e., Czestochowa, Poland)-LCCN2001697413, Photochrom Print Collection. Public domain, via Wikimedia Commons.
• 1531 Nuestra Señora de Guadalupe anagoria, God (1531 presented by Juan Diego). Public domain, via Wikimedia Commons.
• Glendalough, County Wicklow, Ireland, 1890s, Photoglob Zürich, reprinted by Detroit Publishing Co.. Public domain, via Wikimedia Commons.
• Efes Celsus Kütüphanesi, Hamdigumus. CC0, via Wikimedia Commons.
• Intérieur de couvent-Fleury François Richard-MBA Lyon 2014, François Fleury-Richard. Public domain, via Wikimedia Commons.