In 1978, Russian pianist Grigory Sokolov and the Moscow Philharmonic conducted by Dmitrij Kitajenko performed Rachmaninov’s Third Piano Concerto at the main hall of the State Conservatory in Moscow.
A CD recording is available at Bomba Music (CL 033-660, released in 2010), featuring also pianist Nikolai Petrov in Ravel’s Valses Nobles et Sentimentales.
The Rachmaninov Concerto was recorded by TV and the video is available here.