Desperately seeking this Frida Kahlo painting. Last seen in Poland

After taking an overnight bus to Poznan in Poland for an exhibition on Mexican artists Frida Kahlo and Diego Rivera, two Portuguese sisters are now standing in front of a curious blue suggestion box. “Who can tell us what happened to the missing painting or where we can find it?” reads a sign next to a photo of Kahlo’s largest work, “The Wounded Table”, a mysterious surrealist masterpiece that vanished without a trace in Warsaw more than half a century ago. “I wrote that the painting was probably destroyed. Or it could have been stolen and sold on the black market,” says 21-year-old Ines Cavaco, currently studying in the Polish city of Krakow. “For sure. It’s sitting in someone’s living room,” adds her sister Joana, a 23-year-old megafan who did her hair up with flowers in homage to Kahlo’s trademark look. A black-and-white replica of the horizontal oil painting, a double self-portrait with Kahlo represented both as herself and a wounded table dripping with blood, can be seen until Ja