Responding to a request by Pope Clement XI to aid in the fight against the Turks, in 1716, King John V of Portugal (Infante Francisco's brother) sent an armada of Portuguese ships to aid Venice and Austria in their fights against the Turks, led by the Duke of Beja, and Lopo Furtado de Mendonça, Count of Rio Grande.[2]
Affairs and issue
He died unmarried and without legitimate issue (in spite of two illegitimate children from Mariana da Silveira) on 21 July 1742 at the Quinta das Gaeiras in Óbidos. He is buried at the Royal Pantheon of the Braganza Dynasty in Lisbon.
He had two natural children with Mariana Silveira, a nun, who died during the 1755 Lisbon earthquake:
Generations indicate descent from Afonso, Duke of Braganza, founder of the House of Braganza, until João II, Duke of Braganza, the first Braganza monarch of Portugal; italics indicate a head of the House
Generations indicate descent from John IV, King of Portugal, formerly John II, Duke of Braganza, the first Braganza monarch of Portugal, until Manuel II, King of Portugal, the last monarch of Portugal, excluding the Miguelist line; italics indicate a head of the House
* also an infante of Castile and León, Aragon, Sicily and Naples,§ also an infante of Spain and an archduke of Austria,# also an infante of Spain,‡ also an imperial prince of Brazil,¶ also a prince of Saxe-Coburg and Gotha, Duke in Saxony,◙ also a prince of Braganza,¤ title removed in 1920 as their parents' marriage was deemed undynastic,ƒ claimant infante
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