A Look at the Empire State Building

Empire State Realty Trust, the parent company of New York's Empire State Building and 17 other buildings, began trading on the New York Stock Exchange last week. The firm raised $930 million in the IPO, with its 71.5 million shares trading at around $13 per share.

It's the latest milestone for one of the world's most famous structures. 

Here's a look at some facts, figures, memorable moments and other tidbits about the tower.