8th-century copy of the Rule of Saint Benedict —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=2088446

Saint Benedict of Nursia — Detail from a fresco by Fra Angelico (c. 1400–1455) in the Friary of San Marco Florence.
Photo Credit: By Fra Angelico - Public Domain, https://commons.wikimedia.org/w/index.php?curid=147499

Pope Paul VI —
Photo Credit: By Vatican City -Public Domain, https://commons.wikimedia.org/w/index.php?curid=14709864

Epitome Astronomiae Copernicanae (1618) —
Photo Credit: By Kepler, Johannes - Public Domain, https://commons.wikimedia.org/w/index.php?curid=50373356

Index Librorum Prohibitorum — cropped from title page (Venice 1564)
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=433142

Steganographia —
Photo Credit: By Trithemius, Johannes. Steganographia. Frankfurt: Johannes Saurius?, 1606.Public Domain, https://commons.wikimedia.org/w/index.php?curid=63528432

Tabula recta —
Photo Credit: By Brandon T. Fields - Public Domain, https://commons.wikimedia.org/w/index.php?curid=15037524

Heidelberg University Great Hall — The Old Assembly Hall or "Great Hall" was redesigned in 1886 in celebration of the university's quincentenary.
Photo Credit: Public Domain, https://en.wikipedia.org/w/index.php?curid=13796537

University Library Heidelberg — The main building of the University Library, built in 1905
Photo Credit: By Jan Beckendorf - https://www.flickr.com/photos/beckendorf/411647510/, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=3245333

Rupert I, Elector Palatine, with his wives. —
Photo Credit: By Unbekannter Maler - Seite über Heidelberger Geschichte, Public Domain, https://commons.wikimedia.org/w/index.php?curid=10573665

Pope Urban VI — In the Basilica of Saint Paul Outside the Walls, Rome
Photo Credit: By Unknown - Public Domain, https://commons.wikimedia.org/w/index.php?curid=42732201