Introduction to the Hall of Mirrors: The Hall of Mirrors is a place used by Maria Theresa to hold family banquets or small concerts. It is named after the crystal mirror in the hall. The room is decorated with white and gold Rococo. host. In 1762, Mozart, a 6-year-old child prodigy, played his first concert for the Queen here. After the first piece was played, Mozart's proud father wrote, "Little Wolfgang jumped to His Majesty held her neck in his arms and kissed her hard. "