The conclusion was reached after an $80,000 study conducted by the Smithsonian Institute as part of a project involving the affiliation of the Mexican Museum in San Francisco to the Institute. Out of the 2,000, mostly donated, items from the pre-Columbian collection, it was determined that only 85 have been found to be important original works, while the rest have been deemed items of lesser importance or forgeries. The study was conducted by Jorge Pérez de Heredia Puente, who has worked for the Instituto Nacional de Antropología e Historia in Mexico. The Mexican Museum in San Francisco built its collection from donations. Andrew Kluger, chair of the Museum's board of trustees said, "It happens all the time that museums accept things that are not real." Pottery, ceremonial objects, and body ornaments from Teotihuacán and the Maya, Zapotec, and Peruvian cultures are part of the collection, which has been increased by a gift from a collector from Berkeley that donated around 86 pre-Columbian sculptures that have been already authenticated.