Keywords: Keystone P.J.H. Cuypers.jpg Artwork Creator Atelier Cuypers-Stoltzenberg Portrait of Pierre Cuypers kneeling with compass and scroll Plaster cast of a keystone used in the Sint-Martinuskerk in Maastricht built in 1857-1858 by Cuypers ucfirst other date ~ 1857-1858 paint plaster cm 58 20 institution Cuypershuis place of discovery object history exhibition history credit line accession number 0295 place of creation Roermond Vincent Steenberg Public Domain http //museumcollecties roermond nl/adlib/Details/cuypershuis/1037 Collectie Online Gemeente Roermons i18n/as Cuypers' Kunstwerkplaatsen Roermond Jean Hubert Lauweriks Portret van de architect Pierre Joseph Hubert Cuypers Collections of the Cuypershuis Keystones Pierre Cuypers Atelier Cuypers-Stoltzenberg Jean Hubert Lauweriks |