UNESCO hereby invites qualified companies to submit sealed tenders for performance of the following works at the Transfiguration Cathedral in Odesa: 1. Reconstruction of the individual heating point 2. Reconstruction of the heating system of the upper temple 3. Reconstruction of the heating system of the -1st floor (at -3.000) 4. Reconstruction of the heating system -2nd floor (at -6.000) 5. Heating system of the bell tower. For more details, please, refer to the document attached.