RIBA is based at 66 Portland Place, London—a 1930s Grade II* listed building designed by architect George Grey Wornum with sculptures by Edward Bainbridge Copnall and James Woodford. Parts of the London building are open to the public, including <answer>the Library</answer>. It has a large architectural bookshop, a café, restaurant and lecture theatres. Rooms are hired out for events.
What is one room in RIBA's headquarters that can be visited by the public?
the Library