As any London geek will know, from the proceeds of his work as a celebrated architect, Soane bought 12 Lincoln's Inn Fields, and the neighbouring house, and used them to amass his interesting collection of possessions. He did so well that by his death in 1837 he was able to arrange for an act of Parliament to leave his collection to the nation
The openings take place on the first Tuesday evening of each month, from 6pm until 9pm, and are free, but you have to get there in plenty of time in order to get in, as the queues sometimes snake down the street.
The museum is perfect to be enjoyed by candlelight, however, with the flames flickering over the nooks and crannies and collections. For full details, see http://www.soane.org/