1716 – 30 March 1736), died before his parents. Peter III of Portugal (5 July 1717 – 25 May 1786), married his niece Maria I, Queen (regnant) of Portugal (1734–1816). Infante Alexandre of Portugal (24 September 1723 – 2 August 1728), died in infancy. Ancestry References Bibliography External links |- 1683 births 1754 deaths 18th-century viceregal rulers Portuguese queens consort Austrian princesses 18th-century House of Habsburg Regents of Portugal Queen mothers Burials at the Monastery of São Vicente de Fora Burials at the Imperial Crypt House of Braganza People from Linz 17th-century Austrian women 18th-century Austrian women 18th-century Portuguese people 18th-century Portuguese women 18th-century women rulers Daughters of emperors Royal reburials Children of Leopold I, Holy Roman Emperor Daughters of kings