Key Tower

Key Tower is a skyscraper on Public Square in Cleveland, Ohio. It was designed by architect César Pelli. It is the tallest building in the state of Ohio, the 26th-tallest in the United States, and the 165th-tallest in the world. 
The building reaches 57 stories or to the top of its spire, and it is visible from up to away. The tower has about 1.5 million square feet (139,355 m²) of office space.