This magnificent square was designed by Bernini.
It was completed in 1667 and can hold 400.000 people. The piazza
has the shape of an ellipse; on each side there's a curving pair
of quadruple colonnades topped with statues of saints. In the middle
of the piazza is an obelisk which was brought from Alexandria in AD 37.
Also in the piazza are two beautiful fountains. To the left and right
of the obelisk are two spots marked on the pavement. If you sit on a
spot and look at the colonnades you get the illusion that the
colonnades are made of a single row of columns. Neat job :-)
