Antiquorum is an auctioneer of modern and vintage timepieces. Established in Geneva in 1974, Antiquorum was the first auction house to auction fine watches over the Internet in the 1990s.

The company was founded in Geneva in 1974 by Osvaldo Patrizzi and expanded to have branches in ten cities, including New York, London, Moscow, Paris, Milan, Munich, Shanghai, and Tokyo. Patrizzi sold 50% of his equity to ArtistHouse Holdings in 2006. In June 2007 he was removed by the board of directors and later filed a number of lawsuits.