The largest ancient water reservoir on the Balkan Peninsula was uncovered in the Thracian town of Perperikon in Bulgaria.

The reservoir is 12m long, six metres wide and six metres deep and has a capacity of 270 000 litres, archaeologist Nikolai Ovcharov said, as quoted by netinfo.bg. The structure was carved in the rocks on the top of Perperikon.

Perperikon had two other reservoirs, which, together with the new discovery, make archaeologists believe that tens of thousands of people lived in the town.

In mid-August 2007, archaeologists also found four huge earthen jars, 1.2m in depth, with a storage capacity of 200 litres. The inhabitants of the town probably stored wine in them.

A display area would be made for the jars and they would become one of the attractions at Perperikon, Ovcharov said.

According to Ovcharov, Perperikon had magnificent planning, strong fortress walls and tens of two-stored houses of stone .