Vandalized Rothko mural restored

London’s Tate Modern put Mark Rothko’s mural “Black on Maroon” back on display Tuesday, more than a year and a half after it was defaced with black ink by a vandal trying to draw attention to an obscure artistic movement.

The gallery has spent 18 months restoring the abstract painting, whose surface is made up of layers of oil, pigment, resin, egg and glue. Wlodzimierz Umaniec received a two-year jail sentence for scrawling “a potential piece of yellowism” on the painting to draw attention to a movement he co-founded.