The holiday celebrations have begun. The theme for this year's White House Christmas is "American Treasures", celebrating the country’s unique heritage, landmarks, parks and monuments. Continuing the tradition from last year, each exterior window at the White House features an evergreen wreath — 105 wreaths in all.

The host for HGTV's White House Christmas special this year is Alison Victoria, seen here in the Grand Foyer just outside the Blue Room, as decorating and preparations are underway.

In another ongoing tradition, this one dating originally to 1801 and the John Adams administration, the "The President's Own" US Marine Band fills the White House with seasonal and traditional music.

The holiday decor is once again designed by First Lady Melania and was executed by more than 225 holiday volunteers representing all 50 states.