The old Monson Academy building, prior to the 1880s. Photo from Our County and Its People: A History of Hampden County, Massachusetts (1902).
The second Monson Academy building, probably around 1900. Photo from Our County and Its People: A History of Hampden County, Massachusetts (1902).
The same site in 2010:
And one year later, following the June 1, 2011 tornado:
Monson Academy was founded in 1804, when the building in the first photo was built. It served as the main building until 1886, when it was destroyed in a fire. It was replaced by the building in the second photo, which also burned, in 1953. Finally, in 1961, the building in the last two photos, Harper Gumnasium, was built on the site. Barely visible to the right of the Harper Gymnasium is the much-older Holmes Gymnasium, which was built in 1900. Both buildings were destroyed by the June 1, 2011 tornado, and were demolished the following year.