In June 1884, a fire hydrant was being laid before the library of the University of Vienna, and an unexpected discovery was made.
They found a Roman grave that had indications it had been opened before since the bricks on the top were broken.It was walled up with large bricks bearing the inscription "Legio Decima Gemina" (The Twins' Tenth Legion). It was among the oldest units of the Imperial Roman Army, and one of four legions used by Julius Caesar in 58 BC when he invaded Gaul. There was reference to the legion in Vienna beginning in the 1st century A.D. It's symbol was a bull.
