Few squares tell a city's story as plainly as this one. On the north side, the Palazzo del Podestà was raised in the 13th century together with the Torre dell'Arengo and renovated from 1484. Beneath it the Voltone, a great vault, stands over an ancient Roman crossroads. Palazzo d'Accursio, the town hall, closes another side, and Vignola's façade of Palazzo dei Banchi, built in 1565–68, replaced a patchwork of medieval house fronts.
Then there is Neptune. The fountain was designed by Tommaso Laureti and executed by Giambologna between 1563 and 1566, and it stands in front of Palazzo Re Enzo, built from 1244, where Enzo, son of Emperor Frederick II, was held prisoner from 1249 until 1272. Nothing here needs a ticket: cross the square slowly, look up at the palace fronts, then sit for a while and watch Bologna go by.