High Quality Content by WIKIPEDIA articles! Raffaele Sansoni Galeoti Riario (May 3, 1461 July 9, 1521) was an Italian Cardinal of the Renaissance, mainly known as the constructor of the Palazzo della Cancelleria and the one who invited Michelangelo to Rome. He was a patron of the arts. He was also the first adolescent to be elevated in the College of Cardinals in the history of the Holy See. Born in poverty in Savona, Riario was the son of Antonio Sansoni and Violante Riario, a niece of Francesco della Rovere, who became Pope Sixtus IV in 1471.