Baton Rouge-based Lamar Advertising Co. is commemorating the 10th anniversary of Hurricane Katrina using 541 digital billboards in 107 markets across the country.

The billboards feature photos of New Orleans and the message “10 Years Stronger” to remember those lost in the hurricane and honor those who’ve rebuilt the city.

“Katrina was one of the largest natural disasters in U.S. history. As a Baton Rouge-based company with operations all over Louisiana and the Gulf Coast, many of our employees and their families were directly affected by the aftermath of the storm,” said Lamar CEO Sean Reilly, who also served on the Louisiana Recovery Authority. “It was incredible to see people coming together from all over the world to rebuild the city of New Orleans. This message is meant to remember that spirit of cooperation 10 years later.”

The billboard campaign started Wednesday and is running through Sunday. Hurricane Katrina struck the Gulf Coast on Aug. 29, 2005, causing levee breaches that left much of the city of New Orleans underwater. Ten years later, the city has been revitalized.

“The personal ties, the business ties, the sense that we’re in it together is just far stronger than it was pre-Katrina. I think this will prove a lasting effect,” Reilly said.