between 1454 and 1516, following the death of one of pero de sem descendant the tower passed into the hands of joão sanches (sanchez) and his wife isabel brandão (brandoa), daughter of joão brandão, accountant in the estate of porto. this would be the beginning of a long relationship within the hands of the brandão family, until the end of the 19th century (along with various urban palaces in porto). by 1576, rui brandão sanches instituted a family majorat that included the estate and tower, along with their other possessions.