Conversation so far:
What type of museum did Peggy Guggenheim plan to open?
A museum for contemporary arts was exactly the institution she could see herself supporting.
Was Peggy Guggenheim successful in her plans for a museum for contemporary arts?
A few days before the Germans reached Paris during World War II, Guggenheim had to abandon her plans for a Paris museum, and fled to the south of France.
When did the Solomon R. Guggenheim Foundation start?
In 1937, Solomon R. Guggenheim established the Solomon R. Guggenheim Foundation to foster the appreciation of modern art
Was there anything of note that came from the Solomon R. Guggenheim Foundation?
The main aim of this foundation had been to collect and to further the production of abstract art, resulting in the opening of the Museum of Non-objective Painting(1939).

Question: How large was the collection of abstract art?
Self-contained rewrite: How large was Peggy Guggenheim's collection of abstract art for her museum plans?