Arts

It now seems like a natural rite of summer — open-air classical music festivals where audiences can hear great music while picnicking under the stars. But 75 years ago, when the Boston Symphony first performed on a former estate called Tanglewood in the Berkshire Mountains of Western Massachusetts, it was a novel idea.

• So we did this thing in Times Square, and some people have seen the video.

On July 20, 1958, at Tanglewood — the summer home of the Boston Symphony Orchestra — pianist Leon Fleisher played an electrifying Brahms First Piano Concerto with the orchestra under its former music director, Pierre Monteux. This remarkable teaming has not been heard since then.