Old Rock House (Alton, Illinois)

The Old Rock House is a historic building located in Alton, Illinois. It is a two-story structure constructed primarily of limestone, giving it its distinctive name. Built circa 1833-1834 by Godfrey Gilman, the building served multiple purposes throughout its history.

Originally, it functioned as a warehouse for Gilman's river trading business, leveraging its proximity to the Mississippi River. Its robust construction was ideal for storing goods transported via river traffic. Later, the building was utilized as a residence, a boarding house, and even a saloon.

The Old Rock House is significant for its architectural style, exemplifying early 19th-century vernacular construction in the region. It is one of the oldest surviving buildings in Alton and a rare example of early commercial and residential architecture made of limestone. Its presence reflects the historical importance of Alton as a bustling river port town.

The building has been renovated and adapted over the years but retains its original stone exterior. It is currently used as a commercial space and remains a landmark in the Alton historic district. It is considered a valuable reminder of the city's early history and its connection to the Mississippi River.