Aeschylus
When Aeschylus first began writing, the theatre was new. Some playwrights like Thespis had made the cast bigger to include an actor who was able to talk with the chorus instead of just the chorus. Aeschylus added a second actor, called the deuteragonist allowing for more drama; and the chorus became less important. He is said to have been the first to use skenographia, or scene-decoration, though Aristotle said the first person was Sophocles. Aeschylus also added more details to the costumes, and had his actors wear platform boots, called cothurni, to help the audience see them better. When they walked on stage in the first performance of the Eumenides, the chorus of Furies were so frightening in looks that they made young children faint, old men urinate, and pregnant women go into labor.