The iconic Festung Ehrenbreitstein in Koblenz opens its gates for a spectacular musical highlight: Sondaschule Open Air. Kingstar proudly presents this unmissable event on August 15, 2026. Prepare for an electrifying night as Sondaschule takes the stage, delivering their signature sound in the breathtaking open-air setting of this historic fortress. Secure your spot for an unforgettable evening of live music and vibrant energy. Tickets are available directly at www.sondaschule.de.