Modern concepts of the performance as a cultural event, indicates the need for multiple spatial relationships between actor and spectator. The central hall of Markideio Theatre is designed to have the established relationship between spectators, stage, proscenium and backstage, while offering the possibility for achieving multiple stage-spectators arrangements (advanced stage, the arena, the bipolar stage, the studio-open plan space). The shell of the existing hall is retained while the structural elements and the walls of the perimeter spaces are removed to give more space for the spectators and the spectacle. The small courtyard to the west is also maintained, allowing the hosting of outdoor events. The outdoor scene is consistent with the orientation of the internal one in order to activate the relationship between the two when desired. The entrance, the foyer and the cafeteria as a linear space, designate the openable glass facade of the building facing the square, an extensive public space, in which theater may be opened up, enhancing the experience of the city as an outdoor cultural field open to everyone.