Design and Installations of Geramanic Anti-gas Shelters During Nazi Reign in World War II

architectural considerations in passive defense at modern times are very necessary and important in safty and security envioronment in war. evaluation of these factors such as shelters is very important and effective so historical background of these spaces can be considered. reviews on history show that during the human wars, defenders has always been the tactical superiority and diffrerent countries in crisis have achived some progress in this area, one of these countries is germany, that in the period of world war II, paid particular attention on defense against enemy air attacks with toxic-gases. from the design and equipment of these spaces, significant results obtained in various sectors, including the heirarchy of inputs, ventilation systems and other parts. the purpose of reviewing the history of each subject is to proper the scientific and empirical interpetation of the subject. by studying the different courses in different time sections. we witnessed a repeation of various factors in different ways