D.C. developer, businessman and philanthropist Calvin Cafritz, the eldest son of real estate icon Morris Cafritz and his wife Gwendolyn, died Thursday at Sibley Memorial Hospital. He was 91.

The Morris and Gwendolyn Cafritz Foundation, the charitable organization Calvin Cafritz had led since 1989, confirmed his passing and provided a copy of his obituary, which didn’t disclose cause of death. The foundation, among Greater Washington’s largest with more than $400 million in assets and some $65 million in annual revenue and expenses, according to its most recent Form 990, is expected to issue a formal statement in the coming days.

“Mr. Cafritz’s grace, elegance, discernment, desire for excellence and commitment to making the most of every day and every situation will continue to inspire and motivate all who knew and loved him,” his obituary reads.

As founder of Calvin Cafritz Enterprises, Calvin Cafritz was deeply involved in D.C.-area real estate, developing projects such as…