[3] The original Main College building was constructed in 1801–02[4] by the architect and master builder, John Johnson, who had also designed its replacement.

On April 26, 1825, the cornerstone for North College was laid by Vermont Governor Cornelius P. Van Ness.

Two months later on June 29, General Lafayette laid the cornerstone for South College during his visit to Burlington while on his national tour.

Each of the buildings was constructed about 7–8 feet apart to prevent fire from destroying the entire facility, as had occurred previously in 1824.

Today, Old Mill is home to the Departments of English, Economics, Geography, Religion, and Political Science.