Billionaire Klaus-Michael Kühne has pledged 300 million euros for a new opera house in Hamburg's Hafencity, aiming to enhance the city's cultural landscape. The Kühne Foundation's donation is under negotiation with the city, which seeks a total of 350 million euros for the project. Kühne, an opera enthusiast, acknowledges he may not live to see its completion, but is committed to leaving a lasting legacy in his hometown.