The Larco Herrera museum, if not mistaken, has a sister museum in Cusco, the Museum of Pre Columbian art. I was some reference to the former whilst in Cusco. Worth a visit if the bigger Lima one is skipped. I bought some lovely reproductions in the Cusco shop, a Chancay mask at 300soles. More expensive than other tourist shops but this was very finely done and painted, I have not seen any re-production of this quality in other shops. Happy find, tho lugging a huge ceramic mask all over the Andes and then Europe was a challenge! haha
It is a very good museum, lighting good and descriptions done well.