Dom Pedro II, nicknamed "the Pacific", was King of Portugal from 1683 until his death, previously serving as regent for his brother Afonso VI from 1668 until his own accession. He was the fifth and last child of John IV and Luisa de Guzmán.

Afonso VI, known as "the Victorious", was the second king of Portugal of the House of Braganza from 1656 until his death. He was initially under the regency of his mother, Luisa de Guzmán, until 1662, when he removed her to a convent and took power with the help of his favourite, the Luís de Vasconcelos e Sousa, 3rd Count of Castelo Melhor.