Lo Spirito del Lago
[www.spirito-del-lago.de]
[www.lospiritodellago.it]


Catalogues of permanent collections
[www.museenkoeln.de/museum-ludwig]
[www.ludwigforum.de]
[www.wilhelm-hack-museum.de]


Publications at
[www.salon-verlag.de]



[www.galerie-rieker.de]
[www.birgitkahle.eu]
[www.brockhaus.de]