Vitzthum identified this drawing as a study for a galley to be called Urbano. The idea of designing a ship may have been suggested by Alessandro Zambeccari, a patron of the sculptor and Lieutenant-General of the Papal Fleet. A more finished study of the poop of the vessel is in the Albertina, J. Montagu, op. cit., no. 84, fig. 64. The cartouches in the Berlin drawing record the fortifications at Forte Urbano, Castel Sant'Angelo and the harbour of Civitavecchia commmissioned by Pope Urban VIII. The wonderfully inventive decorations of the gallery, suitably marine in subject, suggest that the drawings were intended to attract the Pope's eyes rather than as serious and practical designs. If this was indeed the intention of the drawings, it cannot have succeeded, as the Pope and his agents never employed Algardi again, favouring his rival Bernini