In term of thermography, seen as the thermal imager of the door of the tower. It should be protected the leaking of coldness into the tower by placing other door in order to save a heat. For example, this method has used for Castelvecchio (Verona) was built 13th century and located close to Adige River. There has double door and window to protected dampness from the river. It might be a good example in order to apply with this problem.