To quote the Architect of the Capitol (yes, you or your unborn children pay for that, too) recently:

"The British focused their destructive work on the principal rooms, foregoing the lobbies, halls and staircases, thus securing their escape route. In the south wing, soldiers ignited a giant bonfire of furniture slathered with gunpowder paste in the Hall of the House of Representatives. The heat from the fire grew so intense that it melted the glass skylights and destroyed much of the carved stone in the room, including Guiseppe Franzoni's life-size marble statue of Liberty seated on a pedestal, located above the Speaker's rostrum. Downstairs, the Clerk's office was transformed into an inferno of burning documents and furniture; this fire produced a heat so great it forced the British to retreat from the south wing, leaving half of the rooms on the first floor unscathed.