John Jacob Astor IV was one of the richest men in the world when he died on the Titanic. Here's a look at his life.

John Jacob Astor IV was one of the wealthiest people in the world. Library of Congress/Getty Images When John Jacob Astor IV died on the Titanic, he was one of the world's richest people. He built landmark New York hotels like the Astoria Hotel and the St. Regis. Astor's wife, who was nearly 30 years younger, was pregnant aboard the Titanic and survived. John Jacob Astor IV was one of the wealthiest people in the world when he met a tragic end when the Titanic sank on April 15, 1912. His li...