 The Berrien Springs post office opened with the name "Berrien" on December 4, 1832 and changed to Berrien Springs on April 18, 1836.When Berrien Springs became the county seat, its courthouse, designed by local architect Gilbert B. Avery, was completed in 1839.The Greek Revival-style courthouse emulated the architecture of ancient Greece with its large columns, triangular pediment and white paint.