The oldest casino in the world, the Casino di Venezia, sits on the Grand Canal in Venice. Opened in 1638, it was originally a theatre called the Theatre Saint Moses, which had a wing for gambling during the intermissions of plays.
Gaming has roots that trace back to mankind's earliest ancestors. However, it wasn't until the world's very first casino, known as Il Ridotto (Italian: Private Room ), opened its doors in Venice, Italy, that gaming went from small rooms and backlots to a more organized fashion.