Geographically, Aragonese Mudéjar art can be found mainly along the Ebro river valley and its southern tributaries in the northeast Iberian Peninsula. Mudéjar art is an artistic phenomenon that does not belong entirely to the cultures of Western Europe or Islam. Generally speaking, Mudéjar architecture is particularly vulnerable to various causes of deterioration, including climatic and human factors. The particular forms adopted and the exceptional techniques and materials of construction employed are evidence of the characteristics specific to the Mudéjar architecture of Aragon. Mudéjar architecture is recognized today as an art form in its own right.