Theatre of Pompey was a large theater built in ancient Rome, completed in 55 BCE by the general and statesman Gnaeus Pompeius Magnus, commonly known as Pompey. It was the first permanent theater in Rome and could seat around 20,000 spectators. The structure included a stage, seating areas, and a temple dedicated to Venus. The theater was part of a larger complex that featured gardens and porticoes, making it a popular social and cultural hub. It hosted various performances, including plays and gladiatorial games. The Theatre of Pompey also played a significant role in Roman history, as it was the site of the assassination of Julius Caesar in 44 BCE.