When the drama was resumed in 1660, the physical conditions of the theatre underwent a material change. At this time two great play-houses were chartered,--the King's Theatre in Drury Lane, and the Duke of York's Theatre in Lincoln's Inn Fields. Thomas Killigrew, the manager of the Theatre Royal, was the first to introduce women actors on the stage; and parts which formerly had been played by boys were soon performed by actresses as moving as the great Elizabeth Barry. To William Davenant, the manager of the Duke's Theatre, belongs the credit for a still more important innovation. During the eighteen years when public dramatic performances had been prohibited, he had secured permission now and then to produce an opera upon a private stage. For these musical entertainments he took as a model the masques, or court celebrations, which had been the most popular form of private theatricals in the days of Elizabeth and James. It is well known that masques had been produced with elaborate scenic appointments even at a time when the professional stage was bare of scenery. While the theatres had been closed, Davenant had used scenery in his operas, to keep them out of the forbidden pale of professional plays; and now in 1660, when he came forth as a regular theatre manager, he continued to use scenery, and introduced it into the production of comedies and tragedies. But the use of scenery was not the only innovation that carried the Restoration theatre far beyond its Elizabethan prototype. Play-houses were now regularly roofed; and the stage was artificially lighted by lamps. The shifting of scenery demanded the use of a curtain; and it became possible for the first time to disclose actors upon the stage and to leave them grouped before the audience at the end of an act. All of these improvements rendered possible a closer approach to naturalness of representment than had ever been made before. Palaces and flowered meads, drawing-rooms and city streets, could now be suggested by actual scenery instead of by descriptive passages in the text. Costumes became appropriate, and properties were more nicely chosen to give a flavor of actuality to the scene. At the same time the platform receded, and the groundlings no longer stood about it on the sides. The gallants were banished from the stage, and the greater part of the audience was gathered directly in front of the actors. Some traces of the former platform system, however, still remained. In front of the curtain, the stage projected into a wide "apron," as it was called, lined on either side by boxes filled with spectators; and the house was so inadequately lighted that almost all the acting had to be done within the focus of the footlights. After the curtain rose, the actors advanced into this projecting "apron" and performed the main business of the act beyond the range of scenery and furniture.