Visitors often arrive for one reason and leave having understood three.

Religious significance

Catholics regard the pope as the successor of Saint Peter and the Church's spiritual leader — a role that makes the Vatican the faith's central reference point.

Cultural significance

Because popes were also art patrons on a vast scale, the Vatican holds an unusual density of major Renaissance and Baroque commissions in one place.

Historical and diplomatic significance

Few institutions anywhere have operated continuously for as long, and few tiny states carry as much diplomatic weight.