Terry Jones, one of the comedians that made up the famed Monty Python comedy troupe, died at age 77 after battling dementia.

According to Jones’s agent, the comedy legend died last night. In a statement, his family said he died “after a long, extremely brave but always good-humored battle with a rare form of dementia, FTD.”

With Eric Idle, John Cleese, Michael Palin, Graham Chapman and Terry Gilliam, Jones formed Monty Python’s Flying Circus, whose anarchic humor helped revolutionize British comedy.

Jones appeared in the troupe’s TV series and films including “Monty Python and the Holy Grail” and “The Life of Brian.”

In 2016, he was diagnosed with frontotemporal dementia.