Tourism in Rome (with around 4 million tourists a year, making it the world's 39th most popular tourist destination). Other popular sites include St Peter's Basilica, the Forum Romanum, the Pantheon, the Trevi Fountain, the Spanish Steps, Via Condotti, Via Veneto, the Capitoline Museums, the Villa Borghese gardens, the Villa Giulia, Piazza Navona, the Basilica di Santa Maria Maggiore, the Basilica of St. John Lateran, the Piazza del Popolo, the Castel Sant'Angelo, the Campo de' Fiori, the Quirinal Palace, the Lateran Palace and the Palazzo Barberini, to name a few. Rome can be divided into several districts. The so-called historical center ("centro storico")
Piazza (web service) answers and viewing more detailed statistics on class activity. The Piazza team is based in Palo Alto, California. In November 2011, Piazza launched iOS and Android mobile apps which would allow students share their ideas and get their queries answered. Piazza (web service) Piazza is a Q&A web service. It can be described as "mixture between a wiki and a forum" that can be used with learning management systems. The word Piazza comes from the Italian word for plaza—a common city square where people can come together to share ideas and knowledge. Pooja Sankar created the first prototype of Piazza