The Livonian Chronicle of Henry (Latin: Heinrici Cronicon Lyvoniae) is a Latin narrative of events in Livonia (roughly corresponding to today's inland Estonia and the northern part of Latvia) and surrounding areas from 1180 to 1227. It was written c. 1229 by a priest named Henry (Latin: Henricus de Lettis). Apart from some references in Gesta Danorum – a patriotic work by the 12th-century Danish historian Saxo Grammaticus – and few mentions in the Primary Chronicle compiled in Kievan Rus', the Chronicle of Henry is the oldest known written document about the history of Estonia and Latvia. Source: Wikipedia (en)