The Lincoln Memorial will be 100 years old in five years, and the National Park Service wants to make major upgrades before its centennial dedication.

A highlight of NPS’ plans is the addition of about 15,000 square feet of public space beneath the memorial, known as the undercroft. This will let visitors see graffiti tagged by construction workers who built the site between 1914 and 1922, as well as view the foundations that anchor the memorial to the bedrock.

The space will also be a place to view educational and interpretive exhibits and media that delves more into Lincoln, the memorial’s construction, and planning in D.C.

The park service has also come up with ways to enhance the building’s exterior, improve accessibility and operations of the memorial, enlarge doorways, install another restroom and elevator, relocate and expand the retail space, and preserve the structure, among other things.

Philanthropist David Rubenstein donated $18.5 million to the National Park Foundation for the project last fall. At the time, the foundation had received more than $200 million of its $350 million goal for the Centennial Campaign for America’s National Parks, which was setup to make transformative investments in national park sites.

The park service has submitted a proposal for the Lincoln Memorial project to the National Capital Planning Commission, will conduct environmental and other studies, and engage with the public before construction gets underway.

There’s a meeting on June 27 at 6 p.m. at the NPS headquarters in Southwest to introduce the plan to District residents. Folks who can’t make the event can share their thoughts online through July 10.