Westminster Palace is the home of the British Parliament.  During the parliamentary sessions one can watch the debates in the House of Commons as well as in the House of Lords, and the visitors' galleries are free, which must mean that Parliament needs to spend a great deal of money on adequate security, as in the airports.  We had the good fortune to get in, which gave us not only the opportunity of watching the parliamentary sessions, but also to have a look at the marvellous interior of the building.  In the House of Lords we even saw the throne of the Queen.