Jay Pritzker, 76, founder of the Hyatt Hotel chain and one of the richest men in the nation, died Saturday.
Pritzker died in Northwestern Memorial Hospital after suffering a heart attack, according to his family.
Ranked last year by Forbes magazine as the 20th-richest American, with a fortune of $5 billion, Pritzker created Hyatt Corp. with a single hotel and turned it into one of the world's largest hotel chains, with more than 200 hotels and resorts worldwide.
With his brother, Robert, he created a holding company called Marmon Corp., which over the years had interests in Braniff Airlines, McCall's magazine and casinos.
Pritzker, who was the former chairman of Hyatt, was known for his generosity.
He and his brother donated $70 million to various causes in 1996, according to Fortune magazine.
The $100,000 Pritzker Architectural Prize, created in 1979 and awarded annually, is widely considered the most prestigious award in architecture.
Pritzker graduated from Northwestern University and was a naval aviator during World War II. He later earned a law degree from Northwestern. He was on the board of trustees at the University of Chicago and was chairman of the Pritzker Foundation.