One of the attractions in the Telvanni city of Tel Vos is the Imperial Museum and Library. On one of the walls you'll find a note stating "Welcome to the Imperial Museum and Library. Please feel free to peruse the exhibits at your leisure, but please do take care around the prisoner. He has been in a terrible mood since we had to cut down his rations after the escape attempt."

The prisoner they are referring to is an Imperial guard in a nearby cell. Apparently since the Telvanni have very little contact with the Empire, they must have found the guard absolutely fascinating and put him on display.