Complex sentence: This man's remains were covered by a magnificent monument: the stone coffin, in which his body was placed, was six feet deep; a moveable iron grate rested about two feet from the lid; the man's body rested upon the grate.
Split into simpler sentences: This man's remains were covered by a magnificent monument; the stone coffin in which his body was placed, was six feet deep. A moveable iron grate rested about two feet from the lid; the man's body rested upon the grate.