‘Protocols of the Meetings of the Learned Elders of Zion’ sits on a table inside an entrance of the Longworth House Office Building - Washington Post

U.S. Capitol Police suspended an officer Monday after a copy of infamous antisemitic reading material was found near a Capitol Hill security post Sunday, alarming a congressional aide who viewed the document in plain sight at the checkpoint.

Photographs provided to The Washington Post show a printed copy of ‘The Protocols of the Meetings of the Learned Elders of Zion’ on a table inside an entrance to the Longworth House Office Building.

The Post provided the photographs to the Capitol Police on Monday morning and requested comment. The department said Monday evening that acting chief Yogananda Pittman had suspended an officer pending an investigation "after antisemitic reading material was discovered near his work area on Sunday."

"We take all allegations of inappropriate behavior seriously," Pittman said in the statement. "Once this matter was brought to my attention, I immediately ordered the officer to be suspended until the Office of Professional Responsibility can thoroughly investigate."

A House staff member spotted and photographed the document about 7 p.m. Sunday while leaving the South Capitol Street entrance to the Longworth Building, one of the few 24-hour entrances on the House side of the Capitol campus.

It is unclear from the photographs who was in possession of the document, which was held together by a binder clip with its pages tattered and stained. A date stamp indicated that it was printed in January 2019.

There is no known direct connection between the document and the Capitol Police, but members of the force have been under scrutiny for their behavior during the riot. The department said last month that it was investigating 35 officers for their actions during the insurrection, with six of those officers placed on paid suspension pending the outcome of the internal probe.

The tract, also known as the Protocols of the Elders of Zion, is a fable with a century-long provenance that purports to be the account of a meeting where Jewish masters concoct a plan for world domination. The "protocols" they discuss reflect a variety of ancient antisemitic tropes, with a shadowy cabal orchestrating control of the banking system, the media and government in service of their own sinister ends.

It has since been translated into multiple languages, fomenting antisemitic sentiment around the world - including in Germany ahead of the Nazi genocide and more recently in majority-Muslim countries. One version was published in 1920 in a U.S. newspaper owned by auto magnate Henry Ford, and it has since become a staple text of white supremacist groups.