Piazza della Signoria is seen by many to be the heart and core of Florence. It’s definitely considered one of the tourist highlights, as in the area you have Loggia della Signoria, the Uffizi Gallery, the Palace of the Tribunale della Mercanzia, the Palazzo Uguccioni, and the Palace of the Assicurazioni Generali, all gorgeous buildings dating back as far as 14th century, around the time of the Renaissance revival. This is where you’ll find Michelangelo’s David, Bandinelli’s Hercules and Cacus, Ammannati’s Nettuno, and other timeless works of art. There’s a reason why this is considered one of the most touristic (/romantic/artistic) places in the world.
There’s no visit to Florence that doesn’t include a visit to this famous square. It’ll probably be packed with tourists, but regardless – when it comes to Renaissance public art and architecture, this is the place to be.