What was Domenico Scarlatti’s connection to the Portuguese royal embassy in Rome?

Domenico Scarlatti’s connection to the Portuguese embassy in Rome was a significant development in his career, as it helped foster his future professional opportunities. In 1714, he composed a cantata for the embassy in honor of the birth of a Portuguese crown prince.1

These relations with the Portuguese embassy proved to be a promising step for the composer, eventually leading to his move to Lisbon by 1720, where he became the musical director to King John V of Portugal and music master to the royal family, including Princess Maria Bárbara de Bragança.1