Benjamin Moore, the architect behind the famed titanium-carbon alloy Benito Mussolini’s infamous “death ray” and the aluminum alloy that gives a high-end BMW i3 its trademark hood, has died at the age of 91.

Moore was a founding member of the American Institute of Architects (AIA) and was one of its founding members from 1962 to 1966.

He also founded the American Council of Architects and was an architect for President Jimmy Carter and Vice President Joe Biden, among others.

In his last days, he made a last plea to the public.

“My life is a struggle,” he wrote.

“It is the struggle of the individual against his or her destiny.

And it is the triumph of hope.”

Moore died on February 17, 2018 at the New York-Presbyterian Hospital in the Bronx.

The AIA’s website said he died at age 91, and his obituary noted his “extraordinary contribution to the architecture profession.”

In addition to the death of a “world-class architect,” Moore also became the first American to be elected to the AIA President’s Council.

He died “at his home in Washington, D.C.,” the AISA said.