|Character model sheet for Chernabog, by Kay Nielsen.|
The first recorded mention of Chernabog (also variously called Chernobog, Czernobog, Crnobog, and Tchernobog) was from a 12th century account of Slavic culture written by the German Christian priest and historian Helmold of Boseau. Born in Lower Saxony around 1120 CE, Helmold became a priest in 1156, after which he was asked to write the Chronica Slavorum, a history of the conversion of the Slavic people of modern-day Poland. Though ostensibly meant to shed positive light on the time between the conquests of Charlemagne and his own time (the book closes at 1171 CE), Helmold was rather critical of the Holy Roman Empire’s actions against the Wends (another name for Polish Slavs). He decried the Wendish Crusades of 1147 and their leader Duke Henry the Lion as interested in only money and violence. Scholars generally see the Chronica Slavorum as being of questionable historical value where it predates Helmold, but fairly reliable where he is writing about contemporary events.