At the time, the square was larger than it is now (as part of it has later become what is now Via Mercanti, the street located between Palazzo dei Giureconsulti and Palazzo della Ragione) and known as "Piazza del Broletto", after the "Broletto Nuovo", the palace that occupied the centre of the square (now on the north side).
In the 13th century, there were six entry points to the square, each associated to a specific trade, from sword blacksmiths to hat makers.
The square houses four main buildings: The 16th century Palazzo dei Giureconsulti, now located in Via Mercanti, used to mark the north-eastern side of the piazza before it was redesigned.
Palazzo della Ragione has two renowned reliefs, one of a boar (that is reportedly of Roman origin and associated to the legend of the scrofa semilanuta) and one representing Oldrado da Tresseno, who ordered the construction of the palace itself.
Another notable statue dedicated to Ambrose, by sculptor Luigi Scorzini, is found on the facade of the Palazzo dei Giureconsulti.