Royal Opera Gala Visit - 1953
https://www.youtube.com/watch?v=QmeWcCainHw
Now, another great London crowd - this time at the Royal Opera House, Covent Garden, where the Queen and the Royal Family attended the performance of Benjamin Britten's "Gloriana". The audience was large and distinguished and included many Coronation visitors from overseas.
Royal welcome for Trump: Donald and Melania Trump meet the Queen and Kate Middleton as Buckingham Palace hosts spectacular reception for Nato summit
https://www.dailymail.co.uk/news/article-7752119/Kate-Middleton-departs-Buckingham-Palace-help-Queen-Boris-Johnson-host.html