The interior is open to public for events only.
Ticket prices for events vary. Please check the official website for more info.
Wikipedia https://nl.wikipedia.org/wiki/Theater_van_Marcellus
Official website http://www.tempietto.it
Adres Via del Teatro di Marcello, Rome, Latium, 00186, Italy
Coördinaten 41°53'31.055" N 12°28'46.937" E