Gesta Danorum ("Deeds of the Danes") is a patriotic work of
Danish history, by the 12th century author
Saxo Grammaticus ("Saxo the Literate", literally "the Grammarian"). It is the most ambitious literary undertaking of
medieval Denmark and is an essential source for the nation's early history. It is also one of the oldest known written documents about the
history of Estonia and
Latvia.