Manuel I of Portugal
Manuel's mother was the granddaughter of King John I of Portugal, whereas his father was the second surviving son of King Edward of Portugal and the younger brother of King Afonso V of Portugal. In 1495, Manuel succeeded his first cousin, King John II of Portugal, who was also his brother-in-law, as husband to Manuel's sister, Eleanor of Viseu.
Book of Fortresses
King Manuel I (1495–1521) conducted extensive work to centralize and modernize the government of Portugal. Among the most important reforms, there are the Manueline Ordinances and called Reading Nova, the reform of the charters which resulted in 596 new charters throughout the kingdom. In another field, the monarch decreed the execution of the Armoury-Mor of the Book of Sintra room and the Book of Nobility and Perfeiçam Weapons, to regulate the use of heraldic arms in the kingdom and make manifest the will of the sovereign as a source of honor.