Piazza del Quirinale is situated on the Quirinal hill, which is the tallest of the seven hills of Rome. Palazzo Chigi dominates the whole square, today it is the official residence of the president of Italian Republic, but it used to housed thirty popes, four kings and nowadays eleven presidents.
Palazzo Chigi was built in 1583 by Pope Gergory XII as a papal summer residence. When Rome became the capital of the new Kingdom of Italy in 8171, the palace became the official royal residence. The monarchy was abolished in 1946 and since that time it is the official residence and workplace for the presidents of the Italian Republic.
Fondest memory: On the left side of the Palazzo Chigi is situated Palazzo della Consulta, which is the seat of the Italian Constitutional Court. The palace was designed by Ferdinando Fuga in 1732.
Opposite of the Palazzo Chigi stands Fontana dei Dioscuri Castor e Pollux, work of Antinori.5
Fondest memory: If you happen to be at the Quirinale at around 3:00 in the afternoon, you will see the changing of the guard in the piazza, which has some awesome sculptures. This is the official residence of the president of Italy. Keep in mind that the Quirinal Hill is the highest in Rome, so you have a steep climb, especially if you are starting out from Via Nazionale!( okay, not exactly a fond memory!)
Favorite thing: Quirinale: the Official Residence of the President of the Republic. Italian, European and presidential flag are fluttering on the tower of the Quirinale and the presidential one flutters only when the President is present :)