Prince Adam Karol Czartoryski is a Polish and Spanish aristocrat who is head of the Polish House of Czartoryski. He is related to both the Spanish royal family and to France's House of Orléans. In 2016, he sold the family art collection held in the Czartoryski Museum to the Polish state for approximately €100 million.

The House of Czartoryski is a Polish princely family of Lithuanian-Ruthenian origin, also known as the Familia. The family, which derived their kin from the Gediminids dynasty, by the mid-17th century had split into two branches, based in the Klevan Castle and the Korets Castle, respectively. They used the Czartoryski coat of arms and were a noble family of the Polish–Lithuanian Commonwealth in the 18th century.