After the grant of the royal charter it had become known as the Royal Institute of British Architects in London, eventually dropping the reference to London in 1892. In 1934, it moved to its current headquarters on Portland Place, with the building being opened by King George V and Queen Mary.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When was the mention of London included in the Royal Institute's name?
unanswerable