At the start of each White House holiday event, the reception line starts here. The 18-1/2-foot tree in the Blue Room is tall enough to reach the ceiling but narrow enough to allow room for the guests. — Image courtesy of Washington, D.C., photographer Marty Katz

Oversized urns with crystal-lit branches decorate the Cross Hall. — Image courtesy of Washington, D.C., photographer Marty Katz

The crystal branches also flank the entrance to the Blue Room. — Image courtesy of Washington, D.C., photographer Marty Katz

Festive garlands decorate the entrance to the East Room. The stairway leads to the private residence. — Image courtesy of Washington, D.C., photographer Marty Katz