 Complete the following phrase:  During the Party Congress of 1929 the then unfinished Hall of Honour was used for the enactment of a cult of the dead by the National Socialists for the first time. During the Third Reich the Nazis used the site primarily as a commemoration for the fallen soldiers of World War I and commemoration of the 16 dead of the Hitlerputsch the so-called Martyrs of the NS Movement 