The original post: /r/damnthatsinteresting by /u/ojosdelostigres on 2024-09-16 23:24:12.

Original Title: An engraved sapphire hololith, meaning a ring carved from a single stone, with a gold band mounted on the inside, likely during the Middle Ages. It might have to have belonged to Roman emperor Caligula, with the engraving representing Caligula’s wife Caesonia.