What groundbreaking pricing strategy did Frank Lloyd Wright use for the Fallingwater house in 1935 that changed architectural fee structures?

Frank Lloyd Wright's iconic Fallingwater house is renowned for its breathtaking integration with nature, but its financial aspects tell an equally fascinating story. The pricing strategy used for this architectural masterpiece created a precedent that influenced how signature architectural projects would be valued for decades to come. Test your knowledge about this intersection of architectural history and pricing innovation!

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Percentage-based fee (10% of construction costs), establishing the modern architectural fee standard
Fixed pricing regardless of design changes, which became known as the 'Wright Rule' in architectural contracts
Value-based pricing tied to the projected property appreciation over 25 years
Phased payment structure with milestone-based premiums for completing ahead of schedule