The strong–willed Paolo Giordano Orsini II is known to scholars for his penchant for self–promotion through the portraits of himself commissioned from Bernini and other artists active during the first half of the seventeenth century. Here traced for the first time is Orsini’s hitherto little known passion for graphic art, through a previously unpublished and rare inventory of his collection of drawings and a receipt from the Dutch painter Bartholomeus Breenbergh. The author reconstructs the links between the Duke of Bracciano and the extensive community of foreign artists, especially those he maintained with Paul Bril, highlighting the catalytic role of the latter vis–à–vis his fellow countrymen and the keenness for landscapes developed by the aristocrat in the early 1620s. In addition, Orsini’s relations with the French painter Simon Vouet are clarified, and identifications for the sheets described in the documents, with attributions to old masters including Francesco Salviati and Luca Cambiaso, are proposed.