Mentioned by Devon 21 days itinerary
See the Best of England: A Three Week Itinerary
"British Museum – The British Museum is one of the best free museums in the world and is an absolute must visit on any trip to London. The museum is dedicated to human history and culture with its permanent collection consisting of some eight million works and is among the largest and most comprehensive in existence. It documents the story of human culture from beginning to present, covering items from all continents."