Joseph J. O'Donnell's House

He built concessions giant Boston Culinary Group into a company whose 11,000 employees provide food services to stadiums and other venues, and owns Allied Advertising, the third-largest print advertiser in the country. He also has stakes in movie theaters, ski resorts, and restaurants including John Harvard's Brew House. And he's a partner, with longtime friend Steve Karp in the $200 million Westin.

In 2006 he was ranked the 24th richest Bostonian, worth $750 million.

He lives in Belmont, Ma.