A couple of blocks east of Museo del Siglo XIX, the Museo Arqueológico is a quirky, not quite fully realized survey of pre-Columbian groups through pottery pieces from around the country. Perhaps best is the building, a lovely 17th-century townhouse that seems almost surprised with its latest incarnation. Signs are subtitled in English, and a timeline charts back from 1492, including early groups like Ilama (from 700BC).