The Lionel J. Wilson Building in Oakland, California will catch your attention if you love wedge-shaped buildings. Many believe this triangular style was inspired by the flatiron (clothes iron). The most famous is the Flatiron Building in New York City. When the Lionel J. Wilson Building was built in 1907, it was the First National Bank Building. The clock above the door is exquisite. It also makes a perfect pigeon perch.