The General Henry Knox Museum needs to raise $150,000 in less than a month or the historical center could close its doors.

That information was contained in a letter sent to potential donors this week, signed by Board of Trustees Chair Peter Ogden.

The letter states that the $150,000 must be raised by Jan. 15 to deal with the dire situation. The Board of Trustees is scheduled to meet Jan. 18, at which time it will vote on whether to close the museum.

If the museum closes, the state may take the historical collections housed there and sell or abandon the building, according to the letter. The state holds a historic easement on the collections and the building known as Montpelier.

A telephone message was left Tuesday, Dec. 19, for Ogden, but there was no immediate response.

A review of recent filings by the nonprofit organization with the federal Internal Revenue Service shows it has been losing money.

In calendar year 2015, the museum reported revenues of $273,389 and expenses of $406,015, a loss of $132,626.

In 2014, the revenues totaled $285,619, with expenses of $381,597, for a loss of $95,978. There were also operating losses in 2013 and 2012.

The museum had been operating largely through a significant finite gift, but that has been exhausted and no other similar significant gift has been obtained to keep the museum operating, according to the letter. And grant funding has been inconsistent, the letter stated.

The museum honors the life and times of Gen. Henry Knox who served as secretary of war in the administration of President George Washington.

The original Knox home called Montpelier was built in 1794, but was demolished in 1871 to make way for the construction of a railroad in Thomaston. The current building at the intersection of routes 1 and 131 in Thomaston is a recreation built in 1929.

"Knox Museum is actively involved with many schools, everyone from local first- through sixth-grade social studies students, to visiting American history scholars from Bowdoin and Thomas Colleges, to Senior College, and participants of special history tours that arrive by ship and bus to tour Montpelier as part of their Revolutionary American history curricula," according to the museum's website.

In 2016, the Moving Wall, the traveling half-size replica of the monument in Washington, D.C., that memorializes the more than 58,000 Americans who died during the Vietnam War, was erected on the grounds of Montpelier and attracted large crowds during its stay.