The exterior containing statues gives a rich allure that was architecturally somewhat conservative for its date, looking back towards the Villa Medici or the Casina Pio IV, and rather more Mannerist than Baroque. It offered a foretaste of the richly stuccoed and frescoed interiors, where the iconographic program set out to establish the antiquity of the Pamphili, a family then somewhat "parvenu" in Rome, with origins in Gubbio. Inside, Algardi provided further bas-reliefs and stucco framing for the heroic frescoes drawn from Roman history painted by Grimaldi.