The Adena Mansion is a historic house museum in Chillicothe, Ohio. It was built for Thomas Worthington by Benjamin Latrobe, and was completed in 1807. The house is located on a hilltop west of downtown Chillicothe. The property surrounding the mansion included the location of the first mound found to belong to the Adena culture and thus the Adena mansion is the namesake for the Adena people. The state coat of arms is thought to depict the view of Mount Logan from the Adena property. The Adena Mansion is open to visitors for a small fee.