Speaking before greeting Charles and Queen Camilla at a 9/11 memorial event in New York, Mamdani said he would urge the king to return the historic gemstone, which was taken from the Indian subcontinent during British colonial rule in the 19th century.

“If I was to speak to the king, separately from that, I would probably encourage him to return the Koh-i-Noor diamond,” Mamdani said, while adding that the focus of the event remained honoring those killed in the Sept. 11 attacks.It was not immediately clear whether Mamdani raised the issue directly during his brief exchange with Charles, who was seen speaking and laughing with the mayor after the two shook hands at the memorial ceremony.

The Koh-i-Noor, a 106-carat diamond housed in the Tower of London, is among the most prominent jewels in Britain’s Crown Jewels and is mounted in the crown made for Queen Elizabeth the Queen Mother.The gem’s ownership has been disputed for generations.

It passed through the hands of Mughal emperors, Persian rulers and Sikh maharajas before it was ceded to Queen Victoria in 1849 under the Treaty of Lahore following the annexation of Punjab by the British Empire.India has repeatedly sought the return of the diamond, arguing it was taken under colonial rule, though British governments have consistently rejected those requests.

Other countries, including Pakistan, Afghanistan and Iran, have also laid claim to the stone, citing historical ownership ties dating back centuries.The comments quickly drew criticism from Britain’s anti-immigration Reform UK party, whose home affairs spokesman Zia Yusuf described Mamdani’s remarks as an insult to the monarch.

“This beautiful diamond is currently on display in the Tower of London,” Yusuf wrote on X. “That is where it will stay.”Debates over colonial-era artifacts have intensified globally in recent years, with former imperial powers facing growing pressure to return culturally significant objects to their countries of origin.

Charles’ visit to New York included a memorial tribute to victims of the 2001 attacks and meetings with local leaders, amid broader efforts to strengthen diplomatic and symbolic ties between Britain and the United States.

The visit, scheduled to begin on December 3, marks the first time in 27 years that a German President will make an official state visit to the United Kingdom, highlighting a renewed era of cooperation and goodwill between the two nations.

This event will also mark the third state visit hosted by King Charles in 2025, following his successful meetings with French President Emmanuel Macron in July and U.S. President Donald Trump in September.

Each of these visits has played a crucial role in strengthening the United Kingdom’s international relationships, fostering dialogue, and expanding opportunities for trade and cultural exchange.

Buckingham Palace announced that President Steinmeier and his wife, Elke Büdenbender, will be formally welcomed by King Charles and Queen Camilla at Windsor Castle, the royal residence known for hosting many of Britain’s most important diplomatic events.

The visit will celebrate not only the close political and economic ties between the UK and Germany but also the shared history, environmental cooperation, and cultural partnerships that have flourished between the two European powers over the decades.

Strengthening Bilateral Relations

The visit is expected to focus on deepening cooperation in key areas such as green energy, innovation, trade, and cultural collaboration. Germany remains one of the United Kingdom’s most important European partners, and both nations continue to play a pivotal role in shaping the future of Europe and the global economy.

The upcoming state visit is likely to reaffirm commitments to mutual growth, peace, and stability amid the changing political landscape of the continent.

Royal analysts have described the invitation as a powerful symbol of continuity and diplomacy. King Charles has long emphasized the importance of maintaining strong ties with Europe, and this visit will further demonstrate the monarch’s commitment to fostering unity and friendship across borders.

His earlier visit to Germany in March 2023 — his first official overseas trip after ascending to the throne — was warmly received, with German officials and citizens expressing admiration for his dedication to environmental and humanitarian causes.

A Monarch Dedicated to Service

Despite undergoing treatment for an unspecified form of cancer, the 76-year-old monarch has continued to uphold a busy schedule of public duties and international engagements, earning praise for his resilience and sense of duty.

Buckingham Palace has confirmed that King Charles remains actively involved in planning and hosting major state events, reflecting his determination to serve both his country and the Commonwealth with steadfast commitment.

Observers note that this year has been one of remarkable diplomatic activity for the King. The three high-profile state visits hosted by the British monarch represent a clear sign of the United Kingdom’s revitalized diplomatic engagement under his reign.

The visits have also offered an opportunity to promote cultural understanding and showcase Britain’s enduring tradition of royal diplomacy — a practice that continues to build bridges even in a complex global environment.

A Historic Visit with Future Promise

Further details about the program for President Steinmeier’s visit will be revealed in the coming weeks. It is expected to include ceremonial events, meetings with senior government officials, and cultural celebrations that honor the historic friendship and future potential between the United Kingdom and Germany.

As the world looks toward December, anticipation is growing around this visit, which symbolizes more than just royal pageantry — it reflects a commitment to dialogue, mutual respect, and cooperation.

For King Charles, the event will mark another milestone in his reign, emphasizing his belief that diplomacy, sustainability, and cultural exchange are the cornerstones of lasting peace and progress.

The state visit is set to be a positive and unifying moment for both nations — a celebration of history, partnership, and the enduring spirit of collaboration between Britain and Germany.