United Nations Educational, Science and Cultural Organization (UNESCO) hereby invite qualified companies to submit sealed tenders as follows: To conduct urgent repair work at one or two sites in Odesa: Lot 1: 18 Korolenka Ln, Kharkiv, or/and Lot 2: 11 Konstytutsii Square, Kharkiv, Ukraine. The works include dismantling of damaged heating components and installation of heating system etc.