The Trump administration says excavation work for a proposed towering, gilded arch near the White House will begin within the next two weeks.

The project has drawn criticism from preservationists and other opponents who argue that the structure would damage Washington, D.C.’s historic character and important sightlines.

The planned arch is facing a lawsuit, with critics questioning whether the administration has the legal authority to proceed with the project.

Supporters of the structure have defended it as a major architectural addition to the nation’s capital, while opponents continue efforts to stop construction, The Guardian has reported.

Despite the legal challenge, officials say preliminary excavation is expected to move forward soon.