Tilt-and-turn window for a building, comprising: - at least one casement, - a fixed frame, - a fitting system formed between the fixed frame and the casement, the fitting system comprising locking elements for keeping the casement in a locked closed position relative to the fixed frame, - a handle for operating the fitting system, - a motorised drive device for displacing the casement relative to the fixed frame by tilting, ∘ the motorised drive device comprising: ▪ an electromechanical actuator, the electromechanical actuator comprising an electric motor, ▪ a flexible element, a first end of the flexible element being connected to the electromechanical actuator, wherein, when the casement is closed relative to the fixed frame by means of the motorised drive device, starting from an open position by tilting the casement relative to the fixed frame, the flexible element is driven by the electromechanical actuator, - the fitting system being of the tilt-and-turn type so as to be able to pivot the casement relative to the fixed frame about a first axis of rotation and to be able to tilt the casement relative to the fixed frame about a second axis of rotation, characterised in that: - the electromechanical actuator is arranged on a part that is fixed relative to the window, - the motorised drive device also comprises a connecting element, a second end of the flexible element being connected to the connecting element, the connecting element comprising a first slot which cooperates with a movable locking element of the fitting system depending on the position of the handle for operating the fitting system, - the locking elements of the fitting system are configured to be placed manually in an unlocked state prior to the opening, by pivoting or by tilting, of the casement relative to the fixed frame. - at least one casement, - a fixed frame, - a fitting system formed between the fixed frame and the casement, the fitting system comprising locking elements for keeping the casement in a locked closed position relative to the fixed frame, - a handle for operating the fitting system, - a motorised drive device for displacing the casement relative to the fixed frame by tilting, ∘ the motorised drive device comprising: ▪ an electromechanical actuator, the electromechanical actuator comprising an electric motor, ▪ a flexible element, a first end of the flexible element being connected to the electromechanical actuator, wherein, when the casement is closed relative to the fixed frame by means of the motorised drive device, starting from an open position by tilting the casement relative to the fixed frame, the flexible element is driven by the electromechanical actuator, ▪ an electromechanical actuator, the electromechanical actuator comprising an electric motor, ▪ a flexible element, a first end of the flexible element being connected to the electromechanical actuator, - the fitting system being of the tilt-and-turn type so as to be able to pivot the casement relative to the fixed frame about a first axis of rotation and to be able to tilt the casement relative to the fixed frame about a second axis of rotation, - the electromechanical actuator is arranged on a part that is fixed relative to the window, - the motorised drive device also comprises a connecting element, a second end of the flexible element being connected to the connecting element, the connecting element comprising a first slot which cooperates with a movable locking element of the fitting system depending on the position of the handle for operating the fitting system, - the locking elements of the fitting system are configured to be placed manually in an unlocked state prior to the opening, by pivoting or by tilting, of the casement relative to the fixed frame.