US President Donald Trump, accompanied by First Lady Melania Trump, became the first American president to be officially received at Windsor Castle. However, the visit immediately stirred controversy after Trump was seen patting King Charles III on the back — a gesture widely criticized as a breach of royal etiquette. According to British journalists, centuries-old protocol dictates that no one should touch the monarch unless the initiative comes from the king himself. A Historic Windsor ReceptionThe ceremony marked a historic moment, as Trump is the first sitting US president to receive a full state-style welcome at Windsor. Royal Protocol Under the SpotlightThe incident is already dominating British media coverage of the visit, with commentators noting that even small breaches of royal etiquette can carry significant symbolic weight.