The National Park Service (NPS) has raised concerns over the planned construction of a large triumphal arch in downtown Washington, DC, proposed by former President Donald Trump. According to an NPS planning document, the 250-foot (76-meter) structure could cause “adverse effects to historic properties” and disrupt some of the capital’s most iconic sightlines.

The arch is set to be situated in an area where it may interfere with views connecting several significant landmarks, including Arlington House, Arlington National Cemetery, the Arlington Memorial Bridge, and the Lincoln Memorial. These sites are closely linked in their symbolic representation of the United States’ reunification following the Civil War.

The NPS identified approximately 37 nearby historic sites potentially affected by the project. The report suggests that mitigating the impact may require additional planning and programming to preserve the historical integrity of the surroundings. However, the document also acknowledges that some negative effects are unavoidable if the arch’s intended location is maintained.

The planning document has been circulated among preservationists and related organizations, which were invited to provide feedback by a Monday deadline. The National Park Service has yet to publicly comment on the project, and the status of any modifications or approvals remains unclear. Despite the expressed concerns, construction efforts for the arch are reportedly still moving forward.