The Use of Radar Techniques and Boroscopy in Investigating Old Masonry: The Case of Dafni Monastery

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Abstract
This article summarizes the results obtained from the application of two investigation techniques, namely radar and boroscopy, in the masonry of the Katholikon of Dafni Monastery (Attica, Greece). The two techniques were applied with the aim to investigate the type of construction of the monument's perimeter masonry. The application of these two techniques proved to be quite efficient because their results offered reliable information regarding the thickness of stones and thus the thickness of the internal filling material in the monument's three-leaf stone masonry. This article presents and comments on difficulties encountered during the application of these techniques, as well as problems that arose during the interpretation of measurements and observations.