An engraving of Cardinal Ludovico Ludovisi:  portrait of the nephew of Gregory XV, important collector of antiquities and patron of the arts. The print is related to a drawing dated 1627 now in Florence. This print is lettered along the bottom: "LVDOVICVS LVDOVISIVS / S.R.E CARDINALIS VICECANCELLARIVS. // Eques Octaui' Leonus Rom.^s pictor fecit 1628. Sup: pm."

The print formed part of an album of portrait prints assembled by Cassiano dal Pozzo in Rome and described in an early nineteenth-century inventory of prints in George III's library as Portraits of Popes and Cardinals. The album was arranged hierarchically from popes to cardinals and thence on to archbishops and bishops, and within each category chronologically (starting from St Peter, according to tradition the first pope). The album was dismantled later in the nineteenth century and the prints that were retained were integrated with others in the collection.

For more information see Mark McDonald, The Print Collection of Cassiano dal Pozzo. I: Ceremonies, Costumes, Portraits and Genre, 3 vols, Royal Collection Trust 2017, part of The Paper Museum of Cassiano dal Pozzo: A Catalogue Raisonné, cat. no. 1197.