The 70-year-old Navy Annex complex, on the eastern end of Columbia Pike next to the Air Force Memorial, is set to be torn down starting next month.

Demolition on the complex will begin in late May, according to Rep. Jim Moran’s office. The demolition process is expected to last a couple of months.

Until recently, the Navy Annex was home to administrative offices for the Marine Corps. It was originally built as a warehouse in 1941 and has 1 million square feet of office space for up to 6,000 workers, according to GlobalSecurity.org.

The 37-acre site, along with other surrounding land, will be used to expand Arlington National Cemetery.