The father of Vivion de Valera led the introduction of what document?
Vivion de Valera Vivion de Valera (13 December 1910 – 16 February 1982) was an Irish scientist, businessman, lawyer and politician. He was the eldest child of Éamon de Valera and Sinéad de Valera and was named after his paternal grandfather, Juan Vivion de Valera.
John VI of Portugal John VI (Portuguese: "João VI"; none }} – none }} ), nicknamed "the Clement", was King of the United Kingdom of Portugal, Brazil and the Algarves from 1816 to 1825. Although the United Kingdom over which he ruled ceased to exist "de facto" beginning in 1822, he remained its monarch "de jure" between 1822 and 1825. After the recognition of Brazilian independence under the Treaty of Rio de Janeiro of 1825, he continued as King of Portugal and the Algarves until his death in 1826. Under the same treaty, he also became titular Emperor of Brazil for life, while his son, Pedro I of Brazil, was both "de facto" and "de jure" the monarch of the newly-independent country.