The Palace of the Dukes of Braganza is a medieval estate and former residence of the first Dukes of Braganza, located in the historical centre of Guimarães, in the north-western part of Portugal. It was initiated between 1420 and 1422 by Afonso, Count of Barcelos, the illegitimate son of John I of Portugal, after his marriage to his second wife. His descendants would occupy the space until the Dukes of Braganza moved to Vila Viçosa, abandoning the palace.