He gave $50 million to the Los Angeles County Museum of Art to build the Broad Contemporary Art Museum and led the fund-raising campaign to finish the Walt Disney Concert Hall when the project was dead in the water.
The museums, medical research centers and cultural institutions emblazoned with the names of Mr. Broad and his wife, Edythe, include the Broad Art Center at the University of California at Los Angeles, the Broad Center for the Biological Sciences at the California Institute of Technology, and centers for regenerative medicine and stem-cell research at three California universities.
Working with civic leaders and developers, he helped shape a far-reaching plan to transform Grand Avenue, in Los Angeles’s neglected downtown, into a cultural and civic hub, with restaurants, hotels, a large park and a museum, the Broad, that would house Mr. Broad’s collection of more than 2,000 contemporary works.
Along with his art, he collected enemies. Hard-driving, curt and impatient, Mr. Broad was a polarizing figure.
“I’m not the most popular person in Los Angeles,” he wrote in “The Art of Being Unreasonable: Lessons in Unconventional Thinking,” a memoir and business-advice book published in 2012.