Christian historian and author Peter Marshall has died after suffering a massive heart attack at a gym in Orleans, Mass., Sept. 8. He was 70.

Marshall co-authored three best-selling U.S. history books titled, The Light and the Glory, From Sea to Shining Sea, and Sounding Forth the Trumpet.

After graduating from Princeton Theological Seminary in 1965, Marshall pastored in Connecticut and Massachusetts for 12 years.  He devoted much of his life to restoring and maintaining America's Christian and biblical heritage.

Marshall's father, also named Peter, was one of America's most beloved pastors and twice the Senate's chaplain. His mother, Catherine, was well-known for authoring the biography A Man Called Peter and the best-selling novel Christy.

Marshall is survived by three children and three grandchildren. His funeral will be held Monday, Sep.13, in Orleans.