Conversation so far:
How was Ludwig associated with Farnsworth House?
Between 1946 and 1951, Mies van der Rohe designed and built the Farnsworth House.
Was Farnsworth House Mies van der Rohe's first big project?
The Farnsworth House and its 60-acre (240,000 m2) wooded site was purchased at auction for US$7.5 million.

Question: Who was The Farnsworth House purchased by?
Self-contained rewrite: Who was The Farnsworth House purchased by?