In the Silappadikaram, the lights are spoken of. It is said that they must be so arranged as not to make the pillars cast shadows on the king and his party or the other spectators in the audience hall. The lights are said to be big and beautiful. The curtains are then described. The text mentions three curtains; Oru Muha Ezhini, Poru Muha Ezhini, and Karanduvaral Ezhini. The first-mentioned curtain is one which is pulled along to one side, the next is a double curtain, cleft at the middle, the two bits shrinking separately at the two sides, enabling entrance. The last-mentioned curtain is one that rolls upwards and downwards. The, first commentary gives some more details as regards these three curtains. The single curtain shrinking to one side is said to be fixed on the left side, the double cleft-curtain on the right side, and the rolling one in the front. Thus the right side having the double curtain, has the gate of entrance for the danseuse. The second commentator says that the rolling curtain is for occasions of Akasa Charins, those appearing in the sky, such as the Devas. These pertain to drama and not to dance. This mystifying reference, however, shows us that there are other texts which describe a stage completely from the point of view of not only dance, which is performed by one person, but from the point of view of drama also, which has many persons personating in it, and consequently needs greater equipment about the stage.
(‘Theatre-Architecture in Ancient India’ by V. Raghavan)

The last thing mentioned of the stage in the Silappadikaram is the beautification of the stage. Bharata says that the stage and the audience hall must be lavishly decorated with wood-carvings and paintings. The Silappadikaram also says that the stage must have a painted canopy above, that it must have the appearance of a newly built one, and that hangings of pearl and other garlands must beautify it.
(‘Theatre-Architecture in Ancient India’ by V. Raghavan)

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