▁civil ▁registry ▁office , ▁held ▁an ▁exhibition ▁to ▁mark ▁the ▁ 7 5 th ▁anni versary ▁of ▁the ▁bomb ing . ▁ ▁Part icip ants ▁ ▁Exec uted ▁▁▁ ▁Wille m ▁Ar onde us , ▁painter ▁and ▁author ▁▁ ▁( J oh annes ), ▁an ▁historian ▁▁ ▁( R ud olf ), ▁a ▁medical ▁student ▁ ▁Karl ▁Gr ö ger ▁▁▁▁▁▁▁▁▁▁ ▁( K o en ra ad ), ▁an ▁architect ▁ ▁, ▁a ▁tail or ▁who ▁made ▁the ▁police ▁uniform s ▁that ▁were ▁used ▁as ▁a ▁dis gu ise ▁▁▁ ▁, ▁a ▁polic eman ▁ ▁Other ▁participants ▁▁ ▁Ger rit ▁van ▁der ▁Ve en , ▁escaped , ▁arrested ▁and ▁executed ▁in ▁ 1 9 4 4 ▁ ▁Ce es ▁Hon ig , ▁a ▁medical ▁student , ▁sed ated ▁the ▁security ▁gu ards , ▁sent ▁to ▁D ach au ▁concentration ▁camp ▁but ▁surv ived ▁ ▁Wille m ▁Beck , ▁a ▁medical ▁student , ▁sed ated ▁the ▁security ▁gu ards , ▁sent ▁to ▁D ach au ▁concentration ▁camp ▁but ▁surv ived ▁ ▁Fried a ▁Bel inf ante , ▁helped ▁prepare ▁the ▁assault , ▁fled ▁to ▁Switzerland ▁and ▁surv ived ▁ ▁Wille m ▁Sand berg , ▁helped ▁prepare ▁the ▁assault , ▁went ▁into ▁hiding ▁and ▁surv ived ▁ ▁Martin us ▁N ij hoff , ▁helped ▁prepare ▁the ▁assault , ▁ev aded ▁arrest ▁ ▁Lau ▁Maz ire l , ▁helped ▁prepare ▁the ▁assault , ▁arrested ▁in ▁ 1 9 4 4 ▁but ▁released ▁ ▁References ▁▁ ▁Category : D utch ▁resistance ▁Category : The ▁Hol oca ust