During 1874 Garnier and his construction team worked feverishly to complete the new house, and by 17 October the orchestra was able to conduct an acoustical test of the new auditorium, followed by another on 2 December which was attended by officials, guests, and members of the press. The Paris Opera Ballet danced on the stage on 12 December, and six days later the famous chandelier was lit for the first time.[25] The theatre was formally inaugurated on 5 January 1875 with a lavish gala performance. The program included the overtures to Auber's La muette de Portici and Rossini's Guillaume Tell, the first two acts of Halévy's 1835 opera La Juive, along with "The Consecration of the Swords" from Meyerbeer's 1836 opera Les Huguenots and the 1866 ballet La source with music by Delibes and Minkus.