Alberto Katerinovich Cavos[1] (Russian: Альберт Катеринович Кавос, romanized: Albert Katerinovich Kavos; January 3, 1801 [O.S. December 22, 1800] – June 3 [O.S. May 22] 1863)[1] was a Russian–Italian architect best known for his theatre designs, the builder of the Mariinsky Theatre in Saint Petersburg (1859–1860) and the Bolshoi Theatre in Moscow (1853–1856).