 The machinations of Grammatica’s enemy Tommaso Salini over the attempt to sell off the Accademia's altarpiece, thought to be by Raphael, brought about a humiliating retreat, when Cardinal Del Monte intervened to re-establish the constitution of the institution.His fortunes were in a way linked with the Cardinal himself, who was much frowned upon by the Barberini, and his death preceded that of Del Monte by four months, in April 1626.His works are exhibited in numerous public collections, including the State Hermitage Museum - St Petersburg, the Museo Nacional del Prado – Madrid,
 the Kunsthistorisches Museum, Vienna, the Muzeul Naţional Brukenthal - Sibiu/Hermannstadt, Romania, the Kelvingrove Art Gallery and Museum – Glasgow,
 and the Maison D’Art Gallery, Monaco.