Duintjer discusses several unusual buildings in Rotterdam. Ir. J.W.C. Boks designed building center in Rotterdam in or before 1953. Corn. Elffers designed church of Free Evangelical Congregation in Rotterdam in or before 1953. G.T.J. Kuiper designed Baptist Church in Rotterdam in or before 1953. Corn. Elffers designed congress hall for Salvation Army in Rotterdam in or before 1953. Illustrations: aerial/bird's eye view Bouwcentrum at Rotterdam, arch. Boks; photo/interior Bouwcentrum at Rotterdam, arch. Boks; reproductions/plans Bouwcentrum te Rotterdam, arch. Boks; reproduction/section Bouwcentrum te Rotterdam, arch. Boks; photo/exterior building Free Evangelical Congregation in Rotterdam, arch. Elffers; photo/interior building Free Evangelical Congregation in Rotterdam, arch. Elffers; reproduction/plan of building Free Evangelical Congregation in Rotterdam, arch. Elffers; photo/exterior Baptist Church in Rotterdam, arch. Kuiper; photo/interior Mennonite Church in Rotterdam, arch. Kuiper; reproduction/plan Doopsgezinde Kerk te Rotterdam, arch. Kuiper; photo/exterior conference room Salvation Army in Rotterdam, arch. Elffers; reproductions/plans convention hall Salvation Army of Rotterdam, arch. Elffers; photo/interior convention hall Salvation Army in Rotterdam, arch. Elffers Design years: 1954 (front)