Palazzo Re Enzo Palace in Bologna, got its name from the ruler of Sardinia Enzo, son of Emperor Frederick II, who was imprisoned here from 1249 until his death in 1272.

The Palace was built in 1245 as a continuation of the adjacent Palazzo podestà. Then it was called simply the Palazzo Nuovo – new Palace. Three years after the completion of construction at the Battle of Fossalta was captured by the Sardinian Enzo, which after a short stay in Anzola moved to Bologna and imprisoned in the new Palazzo. According to the legend, the day the prisoner was allowed to roam the Palace, but on the night he was locked up in a cage suspended from the ceiling. He had his court staff and even a private chef. Also Enzo was allowed to see the women thus was born his three daughters and, according to unconfirmed version, son, born of a simple peasant. The boy was named Bentivoglio from the words "Amore mio, ben ti voglio," which in Italian means "Mother, I love you". People say that he became the ancestor of the famous family Bentivoglio – rulers of Bologna in the 15th century. Enzo was buried in the Basilica of San Domenico, as he wanted.

In 1386 Antonio di Vicenzo finished work on the Hall of Three Hundred – Sala dei Trecento, which has become a city archive. In 1771 by the project of Giovanni Giacomo Dotti was a large-scale reconstruction of the upper floor of the Palace, and in the early 20th century, it acquired its present Gothic style by architect Alfonso Rubbiani. To the right of Palazzo Re Enzo is the chapel of Santa Maria dei Carcerate crossed sentenced to death. On the ground floor of the Palace houses Carroccio – four-wheeled vehicle-the altar on which the priests led the service during the battles, and other military instruments, and the middle floor was occupied by offices of praetor and another chapel.

Today, the luxurious Palazzo Re Enzo, with 2500 square meters of area, is one of the main historical attractions of Bologna.