Tiahuanaco, 400-900 AD, Bolivia, South America

Casa Grande (Great House) Ruins National Monument, home to the Sonora Desert people, founded near 400 AD, abandoned about 1450 AD, Coolidge, Arizona, United States of America, North America

Casa Grande (Great House) Ruins National Monument, home to the Sonora Desert people, founded near 400 AD, abandoned about 1450 AD, Coolidge, Arizona, United States of America, North America

Al-Hamra village and the palm grove, a 400-year-old town in the region Ad Dakhiliyah, Akhdar Mountains, Sultanate of Oman, Arabian Peninsula

Al-Hamra village and the palm grove, a 400-year-old town in the region Ad Dakhiliyah, Akhdar Mountains, Sultanate of Oman, Arabian Peninsula

El Frisco de Placeres, dating from 400-600 AD, from Los Placersos, Campeche, National Museum of Anthropology, Mexico City, Mexico, North America

El Frisco de Placeres, dating from 400-600 AD, from Los Placersos, Campeche, National Museum of Anthropology, Mexico City, Mexico, North America

Close-up of carved statue at the Tiahuanaco site, 400-900 AD in Bolivia, South America

Columns of Byzantine Civic Centre Church dating from around 400 AD, built over earlier Roman civic centre, Pella, Jordan Valley, Jordan, Middle East