Space for the
theatre was cleared by
Julius Caesar, who was murdered before its construction could begin; the theatre was advanced enough by 17 BC that part of the celebration of the
ludi saeculares took place within the theatre; it was completed in 13 BC and formally inaugurated in 12 BC by
Augustus, named after his nephew
Marcus Claudius Marcellus who had died in 23 BC. 's
scale model of ancient Rome at the
Museum of Roman Civilization, showing the Theatre of Marcellus between the
Circus Flaminius and the
Forum Olitorium, the Roman vegetable market. The
bridge connecting it to
Tiber Island is the
Pons Fabricius. The theatre was 111 m in diameter and was the largest and most important theatre in Ancient Rome; it could originally hold between 11,000 and 20,000 spectators. It was an impressive example of what was to become one of the most pervasive urban architectural forms of the Roman world. The theatre was built mainly of
tuff, and concrete faced with stones in the pattern known as
opus reticulatum, completely sheathed in white
travertine. However, it is also the earliest dateable building in Rome to make use of fired
Roman brick, then a new introduction from the Greek world. The network of arches, corridors, tunnels and ramps that gave access to the interiors of such Roman theatres were normally ornamented with a screen of engaged columns in Greek orders:
Doric at the base,
Ionic in the middle. It is believed that
Corinthian columns were used for the upper level but this is uncertain as the theatre was reconstructed in the Middle Ages, removing the top tier of seating and the columns. Like other Roman theatres in suitable locations, it had openings through which the natural setting could be seen, in this case the
Tiber Island to the southwest. The permanent setting, the
scaena, also rose to the top of the
cavea as in other Roman theatres. ==Later use==