President Donald Trump signed a proclamation on Thursday designating the Oval Office, the outer Oval Office and the Cabinet Room a national monument.
The stated purpose is to prevent future presidents from making major changes to the three rooms. Trump said no "major modification" to the Cabinet Room or the Oval Office could occur "without the approval of Congress".
He said the designation would then be put to the legislature. "So we're going to be declaring it a national monument, and we're going to send it over to Congress, have it ratified," he told reporters.
He said the effect would be to make the rooms "impossible to knock down and change in any meaningful way", and that the space "will not be allowed to be touched by anybody".
The report of the signing did not specify which legal authority the designation relies on, and did not give a proclamation number or an effective date.
All three rooms remain in use. The Oval Office is the president's working office and the room in which he spoke to reporters on Thursday.
The designation follows a period of redecoration. Gold touches have been added throughout the West Wing. Of the Cabinet Room, Trump said the interior was "pretty much the same" as before but "substantially upgraded", and that he had added new chandeliers. Asked whether a future president could remove the gold accents, he said a future leader could, but "very carefully".
It is part of a wider building programme. The East Wing was demolished in October 2025 for the White House ballroom project, and on Wednesday reporters were invited to the construction site to watch the final beam raised.
A monument, in the ordinary sense of the word, is a thing kept as it was found. That is the whole of the idea, and it is what makes the designation an unusual fit for three rooms whose contents change with their occupant.
On the account given, the proclamation protects the rooms in their present condition. Their present condition includes the chandeliers, which are new. Preservation therefore begins at the most recent layer, and the earliest protected feature of the monument is the one installed most recently.
The instruction that the space "will not be allowed to be touched by anybody" raises a narrower question, which is what the rooms are for. They are offices. An office in use is touched more or less continuously: chairs are pushed back, doors are opened, a desk is leaned on. Conservation practice elsewhere settles this with a rope and a one-way route past the exhibit.
Our analysts are more interested in the ratification route. A monument whose alteration requires the approval of Congress is a monument in which the position of the furniture becomes a legislative question. A chair is either where it was on Thursday or it is not, and there is no third state for a chair.
This also fixes a moment of record. Everything in the three rooms as they stood on Thursday is what the designation protects; anything done to them afterwards is a modification. The new chandeliers were installed on the near side of that line and are now among the features that cannot be removed.
The Department of Unnecessary Research has read the two instructions side by side and reports a conflict. The rooms are to be preserved exactly as they are. The rooms are also to be worked in. Only one of those survives contact with a chair.