This stately Barranco museum began as the private collection of Don Pedro de Osma Gildemeister, who explored Peru gathering art objects from the 16th to 19th centuries. On display in the ornate mansion (Palacio de Osma) are paintings, sculptures, altarpieces, silver pieces, Huamanga stone carvings, and furniture, mostly from Arequipa, Ayacucho, and Cusco. The house is as impressive as the colonial art, with gardens and a separate building with a collection of silver pieces, mostly of religious use. Plan on spending 1 hr. here.