MOMus-Museum of Modern Art dates Behind the Doors. Costakis meets Rubinstein 20 June 2026–10 January 2027 at Moni Lazariston, Thessaloniki. Official dedicated EN page frames the first dialogue between George Costakis’s Russian avant-garde holdings and Yakov Rubinstein’s modernism/Symbolism collection. Soft-window Thessaloniki EMPTY diversify lock.