Welcome to the Fort de Chartres State Historic Site!

Located four miles west of Prairie du Rocher, Illinois, the site marks the location of the last of four successive French forts named “de Chartres.” Built in 1753 by the French during their eighteenth-century colonization of the Illinois Country, the massive stone fort was preceded by three wooden forts, with the first fort erected in 1720. Fort de Chartres served as the French seat of government and its chief military installation in Upper Louisiana from 1753 until 1765 when it was occupied by the British.  In 1763 France ceded much of its territory in North America, including what is now Illinois, to Great Britain. British troops occupied the fort from 1765 until 1772, when encroachment by the Mississippi River caused a collapse of the south wall. Subsequently, the remaining walls and buildings fell into ruin.

Today, the site features an imaginative reconstruction of portions of the fourth Fort de Chartres. The fort gate, built in the 1920s, has been remodeled several times. Portions of the fort’s walls were reconstructed on original foundations in 1989. The site was declared a National Historic Landmark in 1960 and was added to the National Register of Historic Places in 1976.

Inside the fort are the restored powder magazine, believed to be the oldest building in Illinois, two reconstructed stone buildings, and the exposed foundations of other buildings. The powder magazine is stocked with reproduction barrels and barrel racks. A combination museum and office building, built in 1928 on the foundation of an original fort building, houses exhibits depicting the history of Fort de Chartres and the Illinois Country. The large stone Guard House, reconstructed in 1936, contains a Catholic chapel furnished in the style of the 1750s, along with a priest’s room, a gunner’s room, an officer-of-the-day room, and a guard’s room. Also on the grounds are an operating bake oven, a garden shed built of upright logs in post-on-sill construction, and a kitchen garden with raised beds of produce that would have been grown in eighteenth-century Illinois.

Recreational facilities outside the reproduced fort include a day-use area with a picnic shelter and grills.

Fort de Chartres welcomes you to the heart of French Colonial Illinois! Please visit us throughout the year, whether for a wonderful day trip through the hills of southwestern Illinois or at one of our many special events held throughout the year.

Fort de Chartres State Historic Site

1350 State Route 155

Prairie du Rocher, IL 62277

(618) 284-7230


The site is operated by the Illinois Department of Natural Resources. On July 1, 2017 The Illinois Historic Preservation Agency was divided into its constituents, the Abraham Lincoln Presidential Museum and Library and Illinois Historic Preservation, both part of the the Illinois Department of Natural Resources. The state’s historic resources contribute to education, culture, and the economy include ancient burial mounds, forts, and buildings erected by settlers, and homes connected to famous Illinoisans.


Open: Year-round. Site facilities are open Thursday – Sunday, 9:00 AM – 5:00 PM. Site grounds are open from dawn – dusk every day.

Closed: Site facilities are closed on New Year’s Day, Lincoln’s Birthday, Thanksgiving, Day After Thanksgiving, and Christmas Day.

The Illinois Historic Preservation Agency suggested site donation: $4 for adults, $2 for children, $10 for families.

Currently the Fort de Chartres State Historic Site special events are being sponsored by Les Amis du Fort de Chartres.

Learn how you can support Les Amis and their Fort de Chartres 2017 Special Events Giving Campaign-thank you!

July Upcoming Event at Fort de Chartres

July 22-Friends of the Fort Summer Ball

Les Amis Summer Ball 2016 (CK)

Hosted by Les Amis du Fort de Chartres

Les Amis du Fort de Chartres is hosting the fundraising event “Friends of the Fort Summer Ball”. Eighteenth century music and dance calling will be provided by the Booneslick Strings. Period dress not required and all are welcomed. Food is allowed to be brought in but alcohol must be purchased at the bar. This event is open to all and features a silent action. Let’s gather together for some midsummer fun, have a great time while supporting our Fort.

Suggested donation of $20 a person and all funds raised will go directly to the not-for-profit support organization, Les Amis du Fort de Chartres, which supports improvement projects at Fort de Chartres State Historical Site. Event begins at 7 PM and ends at 10 PM at the Prairie du Rocher American Legion,509 Henry St., Prairie du Rocher, Illinois 62277.

July 2017 Cannon Shoot Photo by Ericha Johanning

August 5 & September 2-Fort de Chartres Summer Cannon Shoot

Experience cannon sights and sounds de l´artillerie française de Louisiane at Fort de Chartres on August 5, and September 2, from 10 AM until Noon. The cannon crew will fire the Fort’s cannon and answer questions about 18th century artillery. This annual summer event is free and open to the public. We thank these dedicated volunteers for their annual involvement in these wonderful demonstrations.

And don’t forget, during these cannon events at the Fort, you will have an opportunity to vote on your favorite photos chosen for Les Amis’s Fort de Chartres Photo Boom Contest.  Votes are cast by making a $1 donation for each vote for their favorite Fort photos in the contest.  All contest proceeds will be used to make much needed and necessary repairs to the Fort de Chartres cannon.  Vote now for your favorite contest photo on our Photo Boom page on this website!

Photo credits on this website: Ericha Johanning, Thang Ho Photography, Maddog Michael, Carol Kuntz, Jennifer Duensing, Carl Esperman, James Cheyenne Trambley, and Dave & Deb Horne’s Fort de Chartres Store Facebook page.

Thank you to Scott Irvin for supporting the Fort de Chartres website. The site is maintained by Les Amis du Fort de Chartres volunteers and for any website questions, please email lesamisdufortdechartres@gmail.com. All words in blue offer informational links.

Thank you to Mitch Lopata, of Lopata Design, for the donated graphic art creations for Fort de Chartres, including our new Les Amis logo.

Latest News

Busy Day at Fort de Chartres!
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Thursday, May 18th, 2017, former site supervisor, Darrell Duensing, and Kathy Janik, Fort librarian, welcomed the Fort de Chartres State Historic Site’s new Site Services Specialist, Dr. Todd J. Hamilton, Ph.D. Todd has... Read More