This is part of the DW Griffith season at BFI Southbank and also screens on 27th June. You can find all the details here.
Chicago Reader review:
Made in 1916 and still ahead of the times, D.W. Griffith's magnificent epic intercuts four stories set in four different historical periods—an experiment with cinematic time and space that even the avant-garde has only recently begun to absorb. Griffith conceived the film as four rivers that "seem to flow together in one common flood of humanity." One of the great breakthroughs—the Ulysses of the cinema—and a powerful, moving experience in its own right.
Here (and above) is the trailer.