There isn't a cathedral in England called the royal cathedral. If you are asking where Prince William is getting married - the answer is Westminster Abbey.
I'm thinking the most famous is Windsor castle, if only because it is a Royal residence.
England is a country in the United Kingdom that borders Wales and Scotland. A few things that represent England are the national flag, the Tudor rose, the Royal Arms of England and the Royal Banner of England.
Buckingham Palace
yes, because the queen of England and the royal family live there.
St Paul's Cathedral is the Anglican cathedral for the diocese of London and therefore is an Anglican church (Church of England) and not a Catholic Church. South of the River Thames is the second Anglican diocese in London, the diocese of Southwark, served by the Anglican cathedral called Southwark Cathedral. The Catholic cathedral in London is Westminster Cathedral - the cathedral church for the Catholic diocese of London. Do not confuse Westminster Cathedral, however, with Westminster Abbey. The latter is not a cathedral but something called a 'royal peculiar' - a church owned and administered directly by Her Majesty the Queen.
They were married at St. Paul's Cathedral in London.
Windsor castle in Berkshire, England is the most famous medieval castle in England, home to the British royal family for over 900 years from George 1st to the present Queen Elizabeth
RADA (Royal Academy of Dramatic Art).
No, it is being held at Westminster Abbey.
Because the Queen of England and the Royal Family live there
No - Westminster Abbey is an Anglican church located near the Houses of Parliament and used by the British Royal Family for coronations since 1066, while Westminster Cathedral is a Catholic house of worship on Victoria Street dedicated to the "Most Precious Blood of Jesus Christ".
The place where famous people/ royalty are buried is called a mausoleum