for the unwonted degree of energy awakened by strange conce 
fet the demands of religion. Under the influences of these im 
ses vast feats of engineering were accanplished and far reaching _ 
ult s in art were attained. In four hundred years of decay and 
oilation aceee every trace of structure §, save those related 
religion, havé disappeared from the face of the land, but these 
gsal buildings defy time and will for generations céntinue to 
zle and @stound the world. 
