Which answer matches this clue: the holy year proclaimed by the Pope roughly every quarter century drawing millions of pilgrims to the capital?
AAnno Santo Straordinario
BQuaresima
CAvvento
DGiubileo✓
The first Jubilee was held in 1300 under Pope Boniface VIII; pilgrims who pass through the holy doors of the four major basilicas receive a plenary indulgence.