Olvera Street (Calle Olvera) is a historical district in downtown Los Angeles, and a part of El Pueblo de Los Angeles Historic Monument. It was officially founded in 1781 in Los Angeles, and was renamed to Olvera Street in 1877. Many of the Plaza District's Historic Buildings are on Olvera Street, as well as some of the oldest Los Angeles monuments including the Avila Adobe built in 1818, Pelanconi House built in 1857, and the Sepulveda House built in 1887.