The Smithsonian Institution is closing its diversity office and freezing all federal hiring. The decision will affect dozens of American museums, research centers and libraries, as well as the National Zoo.

The museum’s move followed a similar one last week by the National Gallery, as museums try to comply with an executive order that called diversity programs “illegal and immoral.”

An executive order by Donald Trump prohibits all DEI programs at federal institutions. Some have already dismantled them.