Romuva or Romowe was an alleged pagan place of worship in the western part of Sambia, one of the regions of pagan Prussia. In contemporary sources the temple is mentioned only once, by Peter von Dusburg in 1326. According to his account, Kriwe-Kriwajto, the chief priest or "pagan pope", lived at Romuva and ruled over the religion of all the Balts. According to Simon Grunau, the temple was central to Prussian mythology. Even though there are considerable doubts whether such a place actually existed, the Lithuanian neo-pagan movement Romuva borrowed its name from the temple.

Simon Grunau was the author of Preussische Chronik, the first comprehensive history of Prussia. The only personal information available is what he wrote himself in his work: that he was a Dominican priest from Tolkemit (Tolkmicko) near Frauenburg (Frombork) just north of Elbing (Elbląg) in the Monastic State of the Teutonic Order. He preached in Danzig (Gdańsk) and claimed to have met Pope Leo X and Polish King Sigismund I the Old. The chronicle was written in the German language sometime between 1517 and 1529. Its 24 chapters deal with Prussian landscape, agriculture, inhabitants, their customs, and history from earliest times to up to 1525 when the Protestant Duchy of Prussia was created. It also contains a short vocabulary of the Prussian language, one of the very few written artifacts of this extinct language. While often biased and based on dubious sources, this work became very popular and is the principal source of information on Prussian mythology. The chronicle circulated as a frequently copied manuscript and was first published in 1876. Modern historians often dismiss the Preussische Chronik as a work of fiction.