Treaty of Rositten

The Treaty of Rositten was the concluding treaty to the Livonian War, in Episode XV ("Calamity") of Brazilian Mapping's Alternate History of Europe series. The official terms (and unofficial terms, in italics) are as follows:
# The Livonian Order shall henceforth be recognised as a Polish vassal state called the Duchy of Livonia.
# Livonia shall annex the remainder of Riga and Dorpat.
# Poland shall aid the secularisation of Livonia.
The treaty was signed on November 15th, 1540. 
For more about the history of Livonia during Varna, click here.