Bolesław V the Chaste was Duke of Sandomierz in Lesser Poland from 1232 and High Duke of Poland from 1243 until his death, as the last male representative of the Lesser Polish branch of Piasts.

Lesser Poland, often known by its Polish name Małopolska, is a historical region situated in southern and south-eastern Poland. Its capital and largest city is Kraków. Throughout centuries, Lesser Poland developed a separate culture featuring diverse architecture, folk costumes, dances, cuisine, traditions and a rare Lesser Polish dialect. The region is rich in historical landmarks, monuments, castles, natural scenery and UNESCO World Heritage Sites.