Curse of the Braganzas

The Curse of the Braganzas (in Portuguese "a Maldição dos Braganças") is a myth, referred to in several historical chronicles, concerning the House of Braganza, that ruled the Kingdom of Portugal (1640–1910), the United Kingdom of Portugal, Brazil and the Algarves (1815–1822) and the Empire of Brazil (1822–1889) and, therefore, all the Portuguese Overseas Empire.
This "curse" began in the reign of king John IV of Portugal, in the 17th century, when the monarch allegedly kicked a Franciscan friar who was begging for Alms. In reply, the friar cast a curse, saying that never again would a first-born male of his family live long enough to reach the throne. Since then—with three exceptions—all the first-born males of this dynasty died before they reigned.
With the end of the Braganzas' reigns, firstly in Brazil (1889) and later in Portugal (1910), the curse appears to have ended.