A huge waiting room.

Quotes from the info board:

“In the first of the two presidential reception rooms, the President’s chair is placed on a platform in front of a striped panel symbolizing the flag of the Republic of Viet Nam. Facing the President’s throne-like seat is a chair intended for the guest of honour. Both are carved with dragon’s head motifs. The other chairs are carved with a phoenix head or characters symbolizing longevity. The second is considerably simply.

Between 19 and 23 October 1972, six meetings were held in this room President Thieu and Henry Kissinger, President Nixon’s National Security Advisorc during which Kissinger sought to persuade President Thieu to accept the agreement which was eventually enacted as the Paris Peace Accords of January 1973.