ABSTRACT
As one can clearly distinguish in Figures l and 2, the exterior face of the vertical perimeter walls are built according to the cloisonné masonry system, following two different types of masonry. In fact, there is a lower zone, built with large dimension stones (often reused old material), their length placed horizontally or vertically, in order to form crosses, and an upper zone constructed with smaller stones (Delinikolas et al. 2003). Using radar techniques and endoscopy
(Vintzileou et al. 2004), it was shown that in both cases a three-leaf masonry is used. As expected the width of each of the three leaves at the lower and the upper part is not the same due to the bigger stones used in the external leaf of the lower part. The existence of three-leaf masonry for the construction of the internal vertical walls was also ascertained (Côte et al 2008), while plain brick masonry was used in the construction of all the monolobe, bilobe and trilobe windows, and all the vaulted roof.
