Redemption Rock is a colonial-era historic site in Princeton, Massachusetts. In 1676, during King Philip's War, the release of Mary Rowlandson from her Native American captors was negotiated atop a granite ledge. The 0.25-acre parcel upon which the rock stands was acquired by the land conservation non-profit organization The Trusteā¦Redemption Rock is a colonial-era historic site in Princeton, Massachusetts. In 1676, during King Philip's War, the release of Mary Rowlandson from her Native American captors was negotiated atop a granite ledge. The 0.25-acre parcel upon which the rock stands was acquired by the land conservation non-profit organization The Trustees of Reservations in 1953, and is open to the public.