A fourth century Roman tomb that is one of the most valuable archeological sites in Silistra, north-eastern Bulgaria, is being reopened to the public for the first time in 20 years, Bulgarian National Television said on August 30 2010. The tomb will remain open for visitors until the end of September. The tomb is known for its unique murals and flamboyant frescoes that reflect the transition from ancient to early medieval Byzantine art, the report said. It is believed to be the tomb of a Roman magistrate and his wife. To preserve the murals, the temperature in the tomb has to be constant. Warm summer weather makes suitable ventilation possible. Already more than 100 people had visited the tomb, the report said.