If you happen to witness—or, for the intrepid, participate in—Marina Abramović‘s new work The Artist Is Present, you may notice a well-equipped photographer quietly documenting each daily performance. The artist has asked photographer Marco Anelli to take portraits of every visitor who participates in the piece. The results, as you can see below and on the exhibition website, are captivating.

Check back frequently, as the images are updated regularly. At this point there are over eight hundred portraits!