A pressure bulkhead for a fuselage of an aircraft is configured for bounding a fuselage interior relative to an external environment. The pressure bulkhead includes a flat skin configured to span a cross-section of the fuselage and having a cavity disposed at a core region of the skin. The core region is radially bounded by a ring element. A plurality of radial stiffeners extend on the skin and provide stabilization of the skin. Each radial stiffener is fixed at an end to the ring element. A reinforcement element extends over the ring element.