Perhaps Cinemiracle you also saw Dr Zhivago and Lawrence when shown at the Rivoli in the early 70s for theatrical re-release? Though Lawrence was so poorly cut to get in more showings the NY Times did a Sunday essay in the Arts and Leisure section on what a travesty it was.
Well as much as I like SOM even I would consider that a bit much.
How lucky you were. You probably got to see a lot of great theater in NY in the 60s and you got to see the Capitol!