Conversation so far:
What type of Wall works did Piet Mondrian create?
Eight large compositions of colored bits of paper he had tacked and re-tacked to the walls in ever-changing relationships constituted an environment that, paradoxically, was stimulating and restful.

Question: Where did Mondrian create most of his Wall Works?
Self-contained rewrite: Where did Piet Mondrian create most of his Wall Works?