Before revision: URL In 1880, the congress visited Caves of Poço Velho during the eighth session of the Congrés Internacional d'Anthropologie et d'Archéologie Préhistoriques (CIAAP), which was being held in Lisbon, Hungary that year.
After revision: URL In 1880, the congress visited Caves of Poço Velho during the eighth session of the Congrés Internacional d'Anthropologie et d'Archéologie Préhistoriques (CIAAP), which was being held in Lisbon, Portgual that year.