Palazzo San Galgano - University of Siena — The School of Humanities and Philosophy
Photo Credit: By Sailko - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=29182644

logo for University of Siena —
Photo Credit: By Source, Fair use, https://en.wikipedia.org/w/index.php?curid=40220622

Coronation of Enea Silvio Piccolomini as Pope Pius II —
Photo Credit: By Pinturicchio - Public Domain, https://commons.wikimedia.org/w/index.php?curid=15885201

Pope Pius II —
Photo Credit: By / Zeichner: unbekannt - Englische Wikipedia, Public Domain, https://commons.wikimedia.org/w/index.php?curid=5155988

Leonhard Euler — Portrait by Jakob Emanuel Handmann (1753)
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=893656

Olinde Rodrigues —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=18352881

Iconum Insigniorum of Flavia Julia Constantia —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=8854324

Emperor Licinius — rts derived by cropping and editing gold Aureus photo
Photo Credit: By Clemchambers - Digital Imaging, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=20936700

Eugenius on a coin — Wearing imperial insignia, celebrating the VIRTVS ROMANORVM, the "(military) virtue of the Romans".
Photo Credit: By Classical Numismatic Group, Inc. http://www.cngcoins.com, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=380126

Solidus of Theodosius —
Photo Credit: By Classical Numismatic Group, Inc. http://www.cngcoins.com, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=91983587

Statue of emperor Valentinian II — Marble - Aphrodisias Geyre - Aydin - 387 – 390
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=5150814