A brief encounter at a dinner party led to one of the most intriguing and beautiful design collaborations of the 20th century—and sparked a firestorm of society gossip. When Modernist architect Mies van der Rohe met accomplished physician and polymath Dr. Edith Farnsworth, the resulting house he designed for her was a structure so simple, so elegant, and in such defiance of conventional wisdom, that it revolutionized domestic architecture forever.