St Peter's was a "building site" for a period of 176 yeas from when Nicholas V decided to build this impressive basilica situated in the Vatican City. The present church stands on the ruins of the ancient Early Christian church dedicated to Peter and which contained the tomb of the apostle. The dome of St Peter's, which was designed by Michelangelo. St Peter's is reached from Via della Conciliazione and the square that awaits you, in front of the basilica, was designed by Bernini. This square is enclosed by a marvellous colonnade. The door to be found at the far right is the Holy Door (Porta Santa) which is officially opened by the Pope at the beginning of a Jubilee year.