During their existence, art monuments suffer the permanent, slow, but destr
uctive action of environmental factors, some of which may be associated wit
h mankind's interventions.
Knowing the causes which have determined the degradation or the partial or
total destruction plays an important role in assessing the condition of a m
onument from the viewpoints of resistance, modifications in the constructio
n materials and structure. The article presents the technical advantages of
utilising a thermographic testing system to find faults in the brickwork o
f a more than 60 year-old church, considered as a jewel of Byzantine art.