Photocopy of the contract with the company Paris-Isaac for the supply of the iron cover, dated 1877, postcard, images of the floor plan and bird's eye view of the basilica (reproductions), excerpts from the report on the architectural condition of the basilica (by ir. M.J. Granpré Molière, ir. C. Geenen, ir. G.M. Leeuwenberg, and ir. H.W.J. Thunissen), dated 1955.