 The building opened September 9, 1909, as a K-12 institution serving the population of Lebanon.Over the next few decades, the population of Lebanon grew and the attendance at the institution swelled to such a degree that it eventually became a high school solely serving grades 9-12.South and north wings were added to the building in 1947 and 1948 respectively, as well as a gym in 1950 and an outdoor pool in 1951.