An aircraft comprising a passenger cabin, an exit door, a cross aisle extending laterally across the aircraft from the exit door of the aircraft and a monument system, the monument system comprising a pair of monuments with a first and second monument positioned between a floor and a ceiling of the passenger cabin and proximate to the exit door and to the cross aisle of the aircraft, the first monument having an inward side adjacent to the cross aisle and an outward side opposite the inward side, the first monument further having a pivoting section configured to pivot into the cross-aisle relative to a vertical pivotal or rotational axis substantially parallel to the z-axis or yaw axis of the aircraft creating the temporary functional space across the cross-aisle and obstructing the exit door, the first monument having an upper portion adjacent to the ceiling, a lower portion adjacent to the floor, and at least one middle portion between the upper portion and the lower portion, wherein the first monument is a transformable multi-mode monument, at least one of the middle portion and the lower portion comprising a transforming portion configured to define a functional space across the cross-aisle by reversibly pivoting from the inner side relative to a rotational axis from the stowed state to the deployed state, characterized in that the monument system comprises the pair of monuments on either side of the cross-aisle, each of the first monument and second monument incorporating a pivoting section (120a, 120b) that pivots into the cross-aisle, the pivoting sections (120a, 120b) collectively creating the temporary functional space across the cross-aisle and obstructing the exit door, and in that the first monument has a first inward side and the transforming portion is configured to define the functional space across the cross-aisle in collaboration with the second monument, the second monument having a second inward side opposite the first inward side. the first monument having an inward side adjacent to the cross aisle and an outward side opposite the inward side, the first monument further having a pivoting section configured to pivot into the cross-aisle relative to a vertical pivotal or rotational axis substantially parallel to the z-axis or yaw axis of the aircraft creating the temporary functional space across the cross-aisle and obstructing the exit door, the first monument having an upper portion adjacent to the ceiling, a lower portion adjacent to the floor, and at least one middle portion between the upper portion and the lower portion, wherein the first monument is a transformable multi-mode monument, at least one of the middle portion and the lower portion comprising a transforming portion configured to define a functional space across the cross-aisle by reversibly pivoting from the inner side relative to a rotational axis from the stowed state to the deployed state, characterized in that the monument system comprises the pair of monuments on either side of the cross-aisle, each of the first monument and second monument incorporating a pivoting section (120a, 120b) that pivots into the cross-aisle, the pivoting sections (120a, 120b) collectively creating the temporary functional space across the cross-aisle and obstructing the exit door, and in that the first monument has a first inward side and the transforming portion is configured to define the functional space across the cross-aisle in collaboration with the second monument, the second monument having a second inward side opposite the first inward side.