▁Square ▁and ▁the ▁pla que ▁at ▁the ▁monument ▁on ▁the ▁Af sl uit d ijk . ▁ ▁In ▁The ▁H ague , ▁he ▁designed ▁the ▁war ▁mem orial ▁at ▁N ass au ▁Square . ▁The ▁art ▁nouveau ▁villa ▁R ams ▁Wo er th ▁in ▁Ste en w ijk ▁has ▁rooms ▁that ▁feature ▁a ▁varied ▁collection ▁of ▁his ▁work . ▁ ▁H ild o ▁K rop ▁also ▁designed ▁furn iture , ▁cer am ics ▁( ES K AF ), ▁glass ▁and ▁iron works . ▁ ▁K rop ▁was ▁active ▁through ▁ 1 9 6 7 . ▁ ▁He ▁was ▁buried ▁in ▁Z org v lied . ▁ ▁Polit ics ▁K rop ▁became ▁a ▁member ▁of ▁the ▁Social ▁Democratic ▁Labour ▁Party ▁in ▁ 1 9 0 8 , ▁but ▁out ▁of ▁enthus ias m ▁for ▁the ▁October ▁Revolution ▁and ▁disappoint ment ▁with ▁social - dem ocr atic ▁support ▁for ▁World ▁War ▁I ▁( specific ally , ▁an ▁advert is ement ▁for ▁German ▁war ▁b onds ▁in ▁Het ▁Volk ) ▁he ▁switched ▁alleg ian ces ▁to ▁commun ism . ▁In ▁ 1 9 2 1 , ▁he ▁designed ▁the ▁cover ▁for ▁Henri ette ▁Roland ▁Hol st ' s ▁book ▁Soviet ▁Russia . ▁ ▁In ▁ 1 9 3 1 , ▁he ▁made ▁a ▁b ust ▁of ▁Len in . ▁ ▁In ▁ 1 9 3 2 , ▁he ▁tra ve led ▁to ▁the ▁Soviet ▁Union ▁and ▁stayed ▁three ▁months . ▁ ▁K rop ▁also ▁co oper ated ▁with ▁Soviet ▁intelligence ▁agents . ▁ ▁His ▁first ▁sp