High Quality Content by WIKIPEDIA articles! The Manoel Theatre (Teatru Manoel, in Maltese) is reputed to be Europe`s third-oldest working theatre, and the oldest working theatre in the Commonwealth of Nations. Located on Old Theatre Street (Triq it-Teatru l-Antik) in Valletta, it is now Malta`s National Theatre and home to the Malta Philharmonic Orchestra (Orkestra Filarmonika Nazzjonali).