The first high school in Lancaster, Ohio was founded in 1849 and was housed in a building at the corner of Broad and Allen streets, in what was known then as the North Building. In 1856, the high school was moved to a South School due to overcrowding at the North Building. Enrollment continued to increase and in 1872 the school board had to provide additional classrooms at another building until 1873, when a new three-story North School building was opened. This building eventually became overcrowded, and in 1906 the high school was moved to a new building at the corner of Mulberry Street and Pearl Avenue (the current location of the Stanbery Campus). According to board of education minutes from 1908, the new building already was overcrowded, and in 1914 a bond issue was passed to allow an extension to be added to the existing building. This annex was completed in 1917. Overcrowding continued, and in 1930 another addition to the building was completed. In 1950, the final addition to the high school was completed to the east side of the building, which today houses administrative offices.