7 things Frank Lloyd Wright, one of the most iconic American architects, got wrong about design

"It takes a brave soul to buy one of Wright's houses," says Chicago-based architect John Eifler.

He should know: He's renovated 23 of them.

Frank Lloyd Wright is widely considered the greatest modern American architect. And for good reason - Wright imbued his structures with natural light and pioneered innovative, open floor plans that forever changed the way people thought about housing and architecture. Plus, Wright, who would've turned 150 years old on June 8, was a prolific designer. He worked on more than 400 buildings, and no two are exactly alike.

But nobody's perfect. Innovation almost always comes at a cost.

Here are seven things Wright got wrong about design.