Information & history on rear of lighthouse:
Construction of this fog signal and light station first began in 1901, with the first showing of the light May 23, 1904.  With a concrete base resting on a submarine crib filled with stones, the Romanesque style building has steel framing.  The smaller one-story section of the light contains the fog signal.  The larger, three story section, however, once provided living quarters to the light-keeper and any assistants.  Originally the apparatus for the light was a weight driven, clockwork mechanism.  However, in 1965, the Coast Guard replaced the outdated system with an electric motor.

Information & history on rear of lighthouse:
Built in 1821, Marblehead is the oldest active lighthouse on the Great Lakes.  The light looks vary much like it did when built despite the fact that the tower height was increased from fifty-five to sixty-five feet in the late 1800's.