The Rospigliosi Cup, (so called from the noble Rospigliosi family) sometimes referred to as the Cellini Cup, is a decorative ornament in gold and enamel, previously attributed to Benvenuto Cellini (1500–1571), but now known to be an art forgery, of nineteenth-century manufacture.
The Cup is believed to have been created by Reinhold Vasters, a German goldsmith who worked in Aachen from 1853 to 1890.
Vasters is now believed to be the sole author of many pieces that had previously been attributed as masterpieces of Renaissance jewellery.
Vasters was a highly skilled artisan, as well as a master of replicating another artist's style precisely.
The Cup is now housed at the Metropolitan Museum of Art, in New York.