A Germanlanguage film loosely based on the 1883 operetta Eine Nacht in Venedig A Night in Venice by Johann Strauss II The film was also made into separate Hungarianlanguage version Egy éj Velencében based on the same screenplay The two versions were shot simultaneously The Hungarian version was codirected by Wiene and Géza von Cziffra and used a separate cast of Hungarian actors From Wikipedia