The tower is the only remain of an ancient castle built during the Age of Comuni by Cremona citizens to defend the border towards Lodi. It has a square layout and medieval crenellations. In Spring 1525 it was for 50 days the prison of the French King Francesco I, kidnapped by the Spanish army in the battle of Pavia.
In the rooms at the ground floor there are still some pieces of the frescos dating back to the first years of the Castle. The room at the second floor which was, according to the legend, the prison of the King has some interesting elements: a copy of the king’s armor, a window-seat and some paintings on the walls.