Bishop John B. McCormack, the former head of the Roman Catholic Diocese of Manchester, has died at age 86.

McCormack died Tuesday at Mount Carmel Rehabilitation and Nursing Center, according to an announcement on the diocese’s website.

The statement said McCormack was “called to his rest” on the eve of the anniversary of his 1998 installation as bishop of Manchester.

“Almighty and eternal God, grant eternal rest to your departed servant, John, and may he enter into the eternal gladness of your kingdom. Amen,” the statement said.

McCormack retired in 2011.

Bishop John McCormack 1935-2021 Diocese of Manchester

Before he was appointed as New Hampshire’s ninth bishop by then-Pope John Paul II, McCormack had served as an auxiliary bishop in Boston.

In his administrative role there, he…