The Piazza di Spagna (Spanish Square) is the most famous square in Rome. For a very long time it was the meeting point of all foreigners coming to Rome. In the 17th century it was the residence of the Spanish Ambassador to the Holy See. The area around the residence was Spanish territory and foreigners who stayed here without permission were forced to serve in the Spanish army. The Fontana della Barcaccia (Old Boat Fountain) on Piazza di Spagna was designed and built in 1627-29 by Pietro Bernini, father of the more famous Gian Lorenzo Bernini. The fountain celebrates the fact that before high walls were built along the banks of the Tiber Rome often used to flood. Once the waters were so high that a boat ended up in the square. The decorations on the fountain imitate the coat of arms of Pope Urban VII, Barberini'p, who ordered the fountain to be built. A less aesthetic occupant of the square is Italy's first McDonalds, dating back to 1986. Also in the piazza is a column erected in 1856 to commemorate the Immaculate Conception. The column is topped by a statue of the Virgin Mary, and rests on a base with statues of Moses, David, Isaiah and Ezekiel. The Pope visits the Piazza every year on December 8th to celebrate Immaculate Conception.