It was in the early Eighties that i learned of the Minimal Art collection and history of the Haags Gemeentemuseum.
Crucial for the collection was the interest of almost all modern art curators in Minimal Art. Starting with Enno Develing who introduced the key artists of the Minimal Art scene for the first time in a large exhibition in 1968. Among them Donald Judd, Dan Flavin, Carl Andre and of course Sol LeWitt. Many of them would receive solo prentations in the years to follow, but this first time was a breakthrough for Minimal Art. The catalogue is arare book nowadays and i am lucky to have a copy for sale at www.ftn-books.com
After this first exhibition many exhibitions would follow. Enno Develing, Flip Bool, Rudi Fuchs and Franz Kaiser all took an interest in Minimal Art and because of this interest , exhibitions with LeWitt, Andre and Judd were organized in the decades after this first 1968 Minimal Art exhibition. I doubt that none was as important as this very first one, because after this first one Minimal Art was established as an art form, but another aspect that makes this first ( Develing ) exhibition important is that the relationship between the Gemeentemuseum and these artist was not only an artistic one. The museum and its curators became friends with practically all Minimal Art artists, resulting in an ever growing collection of Minimal Art.
There is a nice link to a tribute to Sol LeWitt to be found over here: