The Philip Glass Ensemble will play a free concert tonight, at Rockefeller Park in Battery City (corner of River Terrace and Warren Street) as part of the River to River festival.

The concert tonight opens with Face the Music, a group of teenage classical musicians who will be playing the composer’s “Glassworks” suite. The Philip Glass Ensemble come onstage at 8pm.

Glass turns 75 this year. A revival of his 1970s magnum opus, the four and a half hour Einstein on the Beach is scheduled to open at the Brooklyn Academy of Music in September.

Below, from 1982, The Philip Glass Ensemble performing “Floe” at the Sadler’s Wells Theatre in London. An excerpt from Peter Greenway’s Four American Composers, 1983: