What happened to the ancient Mississippian town beneath the Brentwood Library?

Much of Middle Tennessee’s important Native American history has been disturbed by development. This has prompted listeners like Kelly Cannon to wonder what’s been lost. She asked Curious Nashville about something she’d heard about the Brentwood Library: “A colleague recently told me that when the Brentwood Library was built remains were found of ancient Mississippian people, along with evidence…