saint peter's

noun

1. a basilica in Vatican City: dome designed by Michelangelo.

noun usually abbreviated to: St Peter’s

1. the basilica of the Vatican City, built between 1506 and 1615 to replace an earlier church: the largest church in the world, 188 m (615 ft) long, and chief pilgrimage centre of Europe; designed by many architects, notably Bramante, Raphael, Sangallo, Michelangelo, and Bernini