Piazza Maggiore, by unknown, at Sabbioneta, Italy,  .

Piazza Navona, by Bernini, at Rome, Italy, 1600 's.

Piazza del Campidoglio, by Michelangelo, at Rome, Italy, 1538 to ~ 1650.

Piazza del Campo, by unknown, at Siena, Italy, 1280 to 1350.

Piazza di Spagna, or the Spanish Steps, by Alessandro Specchi, at Rome, Italy, 1721 to 1725.

Piazza of San Marco, by unknown, at Venice, Italy, --.

Piazza of St. Peter's, by Bernini, at Vatican City, surrounded by Rome, Italy, 1656 to 1667.