The core of the complex is a semi-circular award theater within the Palais, the Hémicycle d'Honneur, where the prizes were awarded. Duban commissioned Paul Delaroche to produce a great mural, 27 metres long, to represent seventy-five great artists of all ages, in conversation, assembled in groups. In the middle are three thrones occupied by the creators of the Parthenon: sculptor Phidias, architect Ictinus, and painter Apelles, symbolizing the unity of these arts. The mural took Delaroche three and a half years to complete, and it still stands as a powerful expression of the Beaux-Arts collaborative ideal.