The Imperial Calcasieu Museum is home to the Historic Sallier Oak Tree.

The Historic Sallier Oak, registered with the Live Oak Society of the Louisiana Garden Club Federation, Inc., stands to the back right side of the Museum.

Historically the Oak holds its own mystery of origin. The tree experts approximate the age of the tree to be between 200 – 300 years old. It was here that Charles Sallier, whom the lake and city take its name, built his winter home under the shade of this very oak tree. The records show that this land was patented in 1860 by Katherine LeBleu Sallier, the wife of Charles.

The chains seen growing into the tree show the efforts of preservation after the hurricane of 1918 split the tree. The branches on the west side of the tree were destroyed by a storm in 1930. More recently, the Sallier Oak survived Hurricanes Laura and Delta of 2020.