museum kunst palast duesseldorf museum moderner kunst museum of contemporary art sapporo   museums-verein ev kunststoff- -> kunststoff-museums-verein ev musielski, ralph   nagy, laszlo moholy- -> moholy-nagy, laszlo national gallery of art   natrop, he kleine- -> kleine-natrop, he natter, tobias g naturkundemuseum im ottoneum nauman, bruce * (5) nechvatal, joseph neidel, hans nemitz, barbara nerdinger, winfried (2) neri, louise nervi, pier luigi * neuer kunstverein aschaffenburg (4)