Famous for his work on the Bank of England and the dining rooms at Number Ten and Number Eleven Downing Street, Soane spent most of his spare time pottering round the world buying stuff which the natives thought was worth a lot less than it actually was.
In his latter years he bought 12 Lincoln's Inn Fields, and the neighbouring house, and used them to experiment on architecturally and as home for his mountains of stuff. By the time he died in 1837 he had so much he arranged for an act of Parliament to allow him to bequeath it to the nation.
You have to hand it to him though, it is interesting. Unlike other museums and collections it's not all packed away in cases and everything is piled in on top of each other. You don't know what will be next, be it a unique Egyptian sarcophagus or a famed collection of Hogarth's works, it will be packed in with barely enough room to breathe.
The museum is open Tuesday to Saturday, 10am-5pm and on the first Tuesday of each month until 9 pm. Entry is free and the nearest tube is probably Holborn, though there are loads around. For more information visit the website at http://www.soane.org/.