The Peace of Bautzen was a treaty concluded on 30 January 1018, between Holy Roman Emperor Henry II and Bolesław I of Poland which ended a series of Polish-German wars over the control of Lusatia and Upper Lusatia as well as Bohemia, Moravia and Slovakia.

Bolesław I the Brave, less often known as Bolesław the Great, was Duke of Poland from 992 to 1025, and the first King of Poland in 1025. He was also Duke of Bohemia between 1003 and 1004 as Boleslaus IV. A member of the ancient Piast dynasty, Bolesław was a capable monarch and a strong mediator in Central European affairs. He continued to proselytise Western Christianity among his subjects and raised Poland to the rank of a kingdom, thus becoming the first Polish ruler to hold the title of rex, Latin for king.