The collections of the Rijksmuseum, Amsterdam and of the Cleveland Museum of Art each contain related door knockers that present a leafy devil clutching the head of an ox. This apparently unique variant is in the form of a dog-headed monster with foliate wings, a more fish-like body, and a more sinuously curled tail. These door knockers are conventionally attributed to Riccio, but their opulent workmanship, especially impressive in the delineation of scales all over the body of the present example, could as easily be Venetian, and slightly later in date.
[James D. Draper, 1984]
Count Friedrich von Pourtalès , Berlin and St. Petersburg ; Jack and Belle Linsky (until 1982; to MMA)