Saint Peter’s n (Placename) 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 Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014