The Eagle Harbor Schoolhouse is a school located at the corner of Third and Center Streets in Eagle Harbor, Michigan, United States. It is significant as the location where Justus H. Rathbone was first inspired to write the ritual which was the basis of the Order of the Knights of Pythias. The schoolhouse was designated a Michigan State Historic Site in 1971 and listed on the National Register of Historic Places in 1972. It is also known as the Pythian Shrine and as the Rathbone School.