 Nonetheless, the monastery had to be expanded that year to make room for the emperor and the 50 or 60 members of his entourage.From time to time well-known people, including his illegitimate son Don Juan de Austria and his heir Philip II of Spain, came to visit the retired emperor.A fictitious visit by Carlos, Prince of Asturias, and other characters provides the moonlit setting for Act V of the original version of Giuseppe Verdi's opera "Don Carlos", and Yuste is also the setting for both scenes of Act II of that long and celebrated opera.