The Third Tower known as the Montale Tower dates back to the late 13th century. It is the “smallest” in size, but it played a strategic role in defense: in fact, it is placed in the best position for lookout.
It is a fortress with a pentagonal plan, restored several times over the centuries, most recently in 1935. The interior contains an 8-meter-deep dungeon known as the “bottom of the tower.” Around the Montale can be seen very old large boulders of rock, stacked in a primitive manner in the guise of walls.
The section of wall leading from the Second Tower to the parking lot of the ancient quarry belongs to the remains of the second city wall built in the 13th century. The city of San Marino, in fact, was fortified by three sets of walls built at three different times and largely torn down to allow the city to expand.
This tower is not open to the public for visits and can only be admired from the outside.