 In October 1941 , the newly installed mayor of Zagreb , Ivan Werner , issued a decree ordering the demolition of the Praška Street synagogue , ostensibly because it did not fit into the city 's master plan . The demolition began on October 10 , 1941 , proceeding slowly so as not to damage the adjacent buildings ; it was finished by April 1942 . The whole process was photographed for propaganda purposes , and the photographs were shown to the public at an antisemitic exhibition first held in Zagreb . It was also shown in Dubrovnik , <unk> , Sarajevo , Vukovar and <unk> , as an illustration of the " solution of the Jewish question in Croatia " . 
