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!

August Upcoming Event at Fort de Chartres

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!

NASA image from Wikimedia Commons

August 21-Solar Eclipse 2017

Not an official Fort special event, but the day’s information about the Solar Eclipse can be found on this website’s recent blog post Eclipse solaire

August 26-Start of the 100 Day Countdown to Illinois Bicentennial

Activities at three historic sites will signal the start of the 100 Day Countdown to Illinois Bicentennial. State and local officials will speak at each location. Ceremonies start at 9:00 AM at the Liberty Bell of the West on Kaskaskia and culminate Noon-3:00 PM at Fort Des Chartres with reenactments and special flag raising. Food will be available for purchase at Fort Des Chartres. https://illinois200.com/events/start-100-day-countdown/

Saturday, September 16 -Prairie du Rocher Arpent Run/Walk Challenge 85.5 Arpent (5K)

Folks are excited about the upcoming Arpent Run/Walk to be held at the Fort on Saturday, September 16th, beginning 8 AM. Not every day do you have an opportunity to participate in a 5K run and be cheered on for going 85.5 arpents! Step back into the past for this scenic run, where you’ll be greeted by 18th century reenactors along the way. Always something fun in Prairie du Rocher and we love bringing the local community to this event at the Fort sponsored by the Prairie du Rocher Chamber of Commerce. Print off your registration form attached to this event today, or you can also get one from the PdR Chamber of Commerce website at www.visitprairiedurocher.com. Hope to see you there!

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

Eclipse solaire
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For all of you interested in watching the upcoming solar eclipse on August 21 at Fort de Chartres, Site Specialist, Dr. Todd Hamilton created a Facebook event entitled Solar Eclipse 2017, with the... Read More

Hear ye! Hear ye!
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Hear ye! Hear ye!  Illinois Bicentennial Celebration 100 Day Countdown event will begin Saturday, August 26, at the Kaskaskia Bell and the day’s events will conclude at Fort de Chartres State Historic Site!... Read More