Now it is a centre of education, being the main house of the Scuola Normale di Pisa, a higher learning institution part of the University.
[1] It was believed that it was located at the same place as the forum of the antique Portus Pisanus, the harbor of Pisa in Roman age, although that was not proven by any archaeological discovery.
The Captain of the People (Capitano del Popolo) was housed in the near Clock Palace (since 1357), which incorporated some previous existing towers.
After the conquest of Pisa, the buildings remained the same, but changed public offices, a Florentine Commissioner and the Priors instead of the Elders, and a chief of custody instead of the Captain of the People.
Later, in 1558, the square was rebuilt in Renaissance style by Giorgio Vasari, the famous architect of the Grand Duke Cosimo I de' Medici of Florence.