The British Museum was very busy the day after Boxing Day and this was about 18:00 hours at the main entrance. This was my first visit and I only saw a tiny fraction of what was on show but was very impressed.
The designer was the Aberdeen architect Alexander Marshall Mackenzie (qv http://en.wikipedia.org/wiki/Alexander_Marshall_Mackenzie ). All the interior and most of the timber and marble were brought from Australia. [Visitor's London, 1973].