[1] It was founded in 1861 by the Religious Society of Friends (Quakers), receiving patronage from the Central Yearly Meeting and being aligned with the conservative holiness movement.

[3] In 1860, members of the Religious Society of Friends (Quakers), concerned about the spiritual and academic upbringing of their children in light of the American Civil War, constructed a two-story brick building that came to be known as Union High School.

At the turn of the twentieth century, amid waning enrollment due to the advent of public schools in the area, a Quaker minister named William M. Smith was approached by the school committee to expand the operations of the campus.

They are the Greek Revival / Italianate style main classroom building (1861, 1883, 1946, 1953); Greek Revival style President's House (Estes House, 1861), a frame dormitory (1929), and two brick dormitories (c. 1861) that are now private homes.

This article about a property in Hamilton County, Indiana on the National Register of Historic Places is a stub.