NASHVILLE (AP) — The Tennessee State Library & Archives is putting its collection of over a million historic photographs on display for a new exhibit on portraits.

The library in Nashville says its exhibit named Tennesseans Through the Lens: Portrait Photography in Tennessee is free and open to the public.

The photos show how Tennesseans have used portraits throughout history to share pictures of themselves, friends, family members and celebrities.

The exhibit displays the way technology has changed the way Tennesseans document significant moments.

Tennessee State Librarian and Archivist Jamie Ritter says the collection shows the evolution of portrait photography from paintings to pocket-sized photographs.