Keno is a lottery-style game that is played in various gambling venues around the world, including online live casino sites. The game is based on numbers chosen from a field of 80, with players selecting up to 15 numbers in order to win a payout. The game is believed to have originated in the Han Dynasty of ancient China, where it was used to help finance the construction of the Great Wall of China. It also has roots in the French game of lotto, which dates back to the 16th century.