Blending innovation with preservation to deliver a sustainable building that will continue to educate and inspire

Antietam National Battlefield Visitor Center Rehabilitation

The Antietam National Battlefield Visitor Center was built in 1962 as part of the Mission 66 program, which enhanced visitor access to national parks across the United States. Today, it welcomes 350,000 visitors annually, offering education, panoramic views, and immersive exhibits at one of the most intact battlefields in the United States. The 9,000-square-foot (836-square-metre) building features a main lobby and ranger contact station, 100-seat auditorium, observation room, bookstore, and employee offices.

This project marks the first comprehensive rehabilitation of the facility in more than 60 years. We led the design of critical upgrades, including the full replacement of building systems, new site utilities, Americans with Disabilities Act (ADA) compliant accessibility enhancements, energy-efficient roofing, and a rooftop photovoltaic array—transforming the visitor center into a net-zero energy facility.

A surviving example of Mission 66 design, the visitor center reflects the “Park Service modern” style that defined the design program. The site has three distinct periods of significance: the 1862 battle, early 20th-century commemoration, and Mission 66-era development. our design respects and integrates all three, using historical documentation and contemporary surveys to protect key resources.

The original lobby had been expanded twice, diminishing its prominence and flow. We expanded the lobby toward the parking area, reinstating the visual impact of the entry in the spirit of the original design. The steep entrance walkway—a key cultural landscape feature—was redesigned with a gentler slope, balancing accessibility with historic integrity.

Inside, we expanded and reconfigured the lower-level exhibit area, creating a more immersive experience. A new elevator seamlessly connects the lobby, exhibits, and observation deck, providing universal access.

The project blended innovation with preservation to deliver a building that will continue to educate and inspire while meeting modern sustainability standards.