United Nations Security Council
The UN officially came into existence on 24 October 1945 upon ratification of the Charter by the five then-permanent members of the Security Council and by a majority of the other 46 signatories. On 17 January 1946, the Security Council met for the first time at Church House, Westminster, in London, United Kingdom.
United Kingdom and the United Nations
The first meetings of the United Nations General Assembly and the Security Council took place in London beginning on 6 January 1946. The General Assembly met in Westminster Central Hall, and the Security Council met at Church House, Westminster.