Glexis Novoa, a Contemporary Cuban artist, is one of fifty artists that curator Juan Delgado invited to participate in the public art exhibition Detras del muro, in English, “Behind the wall,” during the 12th Havana Biennial. The poetic project he created with homeless residents occupies the ruins of an abandoned building on the Malecón, a five-mile roadway and promenade that run along Havana’s seawall. Titled El vacío (Emptiness), the spare installation offers a nostalgic view of the relationship Cuba once had with Russia and Eastern Europe.