Official opening of the Royal Institute of British Architects' Heinz Gallery, 21 Portman Square, London, on May 4, 1972: Ben Weinreb

NOTES: The Heinz exhibition gallery, designed by Alan Irvine and Stefan Buzas, was located at 21 Portman Square, a house designed by James Adam and built by Samuel Wyatt in 1772. It was home to the RIBA Library Drawings Collection from May 1972 until November 2004 when the Collection was relocated to the Henry Cole Wing at the V&A.