The first sources of the Medieval Tower, next to the Cathedral of Lonigo, date back to 976, but there are hints that some fortifications in Lonigo were already built in Roman times.
In the medieval period, the castle was located on a hill along the Novo River. With the Scaliger and Venetian dominions, sieges and destructions ceased, but by the 16th century, the Castle of Lonigo was almost in ruin as the City of Vicenza had suspended its maintenance.
The Keep (Torrione), approximately 34 meters high, has a base area of 68 square meters (square-shaped) and is the most important element of the old castle. Starting from the base, three construction methodologies can be recognized: a base made almost entirely of bricks, a central part made with squared stones, while the upper part bears the typical mark of Scaliger defensive construction, that is, the alternation between stone and fired clay.
A plaque at its base states that in 1882 the Municipality of Lonigo demolished the remains of the Scaliger Castle and expanded the surrounding squares to build the new Temple (the current Cathedral). It is open to visit during IAT opening hours, and offers an excellent view of the entire city: it was not for nothing that it was the keep of the Castle.