Our current read, "Island of Ghosts," takes place during Marcus Aurelius' reign. Our friend Robert posted a page by Jona Lendering about the Column of Marcus Aurelius, one of the war monuments from ancient Rome. That page also leads to a link on LacusCurtius, Columna M. Aurelii Antonini.
The image is via Wikimedia Commons, from this page about the column.
Update: How did I miss this video?