Saxo Grammaticus (c. 1150 - c. 1220), also known as Saxo cognomine Longus, was a Danish historian, theologian and author. He is thought to have been a clerk or secretary to Absalon, Archbishop of Lund, the main advisor to Valdemar I of Denmark. He is the author of the Gesta Danorum, the first full history of Denmark. Saxo's education and ability support the idea that he was educated outside Denmark. Some suggest the title "Grammaticus" refers not to his education but rather his elaborate Latin style. We know from his writing that he was in the retinue and received the patronage of Absalon, Archbishop of Lund, who was the foremost adviser to King Valdemar I. In his will Absalon forgives his clerk Saxo a small debt of two and a half marks of silver and tells him to return two borrowed books to the monastery of Sorø. The legacy of Saxo Grammaticus is the sixteen book heroic history of the Danes called Gesta Danorum.