Englert, who died on Thursday, was awarded the Nobel Prize together with British physicist Peter Higgs for their theories on how particles acquire mass. They independently proposed the same theory in 1964, which was confirmed in 2012 at the Swiss nuclear research institute CERN.
"It is with great sadness that we announce that Belgian theoretical physicist François Englert has passed away at the age of 93," CERN wrote on Facebook.
When Englert received the Nobel Prize, he told the media that his work had always consisted of "seeking an understanding, a rational comprehensibility of the world."
The Higgs boson is considered by physicists to be the cornerstone of the fundamental structure of matter.
