This is one of the highest honours any leader can receive from the British. Only three other leaders have given an address at the Westminster Hall. These are the Pope (Benedict), Nelson Mandela and the Queen. A bit of its history: Westminster Hall is the oldest building on the Parliamentary estate. What makes it such an astonishing building is not simply its great size and the magnificence of its roof, but its central role in British history. In and around the Hall, grew up the major institutions of the British state: Parliament, the law courts and various government offices. The idea of Parliament was established here, together with Common Law. This hall was build in 1097-1099 by William II (Rufus). A place of World Heritage.