This book although from the 1920 is invaluable if you are looking for archaeological evidence with a primary focus on extant inscriptions from the book on Gaius Caligula
from the author Gaius Tranqullius Suetonius. I found it interesting to dig up any inscriptions for Caligula
or CCAESAR on inscriptions from the Julio Claudian epigraphy
or inscriptions. Coins have plenty of inscriptions, but the marble or stone
inscriptions are rare
. If you want to know more or are looking for something specific, I may be able to help
you find an image from the Caligulan period.
Joe GeranioJulio Claudian