Architecture of Rome huge and majestic Baroque squares (often adorned with obelisks), many of which were built in the 17th century. The principal squares are Piazza Navona, Piazza di Spagna, Campo de' Fiori, Piazza Venezia, Piazza Farnese and Piazza della Minerva. One of the most emblematic examples of Baroque art is the Fontana di Trevi by Nicola Salvi. Notable 17th-century baroque palaces are the Palazzo Madama, now the seat of the Italian Senate and the Palazzo Montecitorio, now the seat of the Chamber of Deputies of Italy. In 1870, Rome became the capital city of the new Kingdom of Italy. During this time,
Piazza San Marco from the lagoon surging up into the Square. Books Piazza San Marco Piazza San Marco (; ), often known in English as St Mark's Square, is the principal public square of Venice, Italy, where it is generally known just as "la Piazza" ("the Square"). All other urban spaces in the city (except the Piazzetta and the Piazzale Roma) are called "campi" ("fields"). The Piazzetta ("little Piazza/Square") is an extension of the Piazza towards the lagoon in its south east corner (see plan). The two spaces together form the social, religious and political centre of Venice and are commonly considered together.