(250520) -- UNITED NATIONS, May 20, 2025 (Xinhua) -- Guests display a commemorative UN stamp sheet marking the 100th anniversary of the Palace Museum at the UN headquarters in New York, May 19, 2025. The Forbidden City, once the seat of Chinese emperors, was honored on the global stage on Monday as diplomats, UN officials and cultural leaders gathered at UN Headquarters to celebrate the centennial of the Palace Museum. The occasion featured the unveiling of a commemorative UN stamp sheet and the opening of the "Endless Vitality" exhibition, co-hosted by the Palace Museum and the UN Chinese Book Club, with support from the United Nations' Global Sustainable Development Goals and Leadership Development Center. (Xinhua)