Excerpts from Books and Wikipedia
"It was Henry's misfortune that his request to the pope was just after the sack or Rome. Clement VII did not dare offend Charles V--Catherine of Aragon's nephew. . . . and in May Archbishop Cranmer declared his first marriage null and void. . . . In 1534 the Act of Supremacy declared that the king was 'the only Supreme Head on Earth of the Church of England.' [Furtado: 1001 Days]
Clement VII (Giulio di Giuliano de' Medici) was the cousin of Leo X. He forbade the divorce of Henry VIII.[Wikipedia]