Pfeffer Mercantile Store

Historical marker location:

406 S Main St, Columbia, Illinois

( Marker is on South Main Street just south of East Madison Street, on the right when traveling north.)

402-418 S Main St.. Historic Main Street.

Illinois was part of the French colonial empire, and the city of Cahokia, located near present-day Collinsville, was one of the largest pre-Columbian cities in North America. At its peak, around 1250 CE, Cahokia had a population of around 20,000 people.