Introduction to Roman Stagecraft. MarshLatin.wordpress.com.
Roman drama has several origins, some native to Italy, some imported. One of the most important influences on Roman Comedy (called the fabulapalliatain Latin, after the 'Greek' cloak or palliumworn by the actors) was the Atellan Farce, a non-scripted theatrical form which made use of stock masks (characters) and slapstick gags.
The actors of Roman comedy were all men, and about five of them shared out all the different roles in the play. The costumes were fairly simple, consisting of a tunic and a pallium, which was long for female characters and short for male characters. The actors also wore masks, which were wildly distorted stereotypes, not very realistic, but funny.
Permanent stone theaters were forbidden in the city of Rome itself by the uptight Roman government, so the plays of Plautus and Terence were performed on temporary wooden stages like this one. The design is based on theatrical wall paintings from Rome, Pompeii, and Oplontis.
The Romans also wrote historical plays (fabulapraetexta) and comedies set in Rome.
(The comedies of Plautus, Terence, and their contemporaries were set in Greece, though the characters displayed a lot of Roman characteristics.) These seem to have died out soon after the Republic began to be ruled by emperors.