President Donald Trump was sued on Friday by preservationists seeking an architecture review and congressional approval over his White House ballroom project.

The National Trust for Historic Preservation is asking a federal court to stop Trump’s White House ballroom project until it goes through comprehensive design reviews and public comments and wins approval from Congress.

The National Trust argues that Trump, by fast-tracking the project, has committed multiple violations of the Administrative Procedures Act and the National Environmental Policy Act, while also exceeding his constitutional authority by not seeking congressional approval for a project of this scale.

Trump, a Republican, already has bypassed the federal government’s usual building practices and historical reviews when he razed the East Wing of the White House. He recently added another architectural firm for a ballroom that itself would be nearly twice the size of the White House before the East Wing’s demolition.

Trump has said a ballroom is overdue for the White House, previously complaining that events were held outside under a tent and guests would get their feet wet if it rained.

The White House is expected to submit plans for Trump’s new ballroom to a federal planning commission before the year ends, about three months after construction began.

Will Scharf, who was named by Trump as chairman of the National Capital Planning Commission, said at the panel’s monthly meeting last week that he was told by colleagues at the White House that the long-awaited plans would be filed in December.

“Once plans are submitted, that’s really when the role of this commission, and its professional staff, will begin,” said Scharf, who also is one of the Republican president’s top White House aides.

He said the review process would happen at a “normal and deliberative pace.”