Cave Canem Latin for ” Beware of the dog “
The Funny side:
I used to read comic books from Asterix and Obelix many years ago. Stories about some French Gauls who resist the Roman occupiers. Mostly fiction but also surprisingly based on facts. The romans obviously spoke Latin and some phrases were hidden in the drawings. One of these “Cave Canem” stuck and was a nice response when someone said “Carpe Diem” for instance.
The Serious side:
Only recently I discovered the origin of the phrase which is on a mosaic found in Pompeii. This also illlustrates the long relationship between man and dog to me.