SERES, or Sirus, a city of European Turkey, in the province of Rumelia, and the circle of the Bay of Contessa. It stands on a fine plain watered by the rivers Egrifi and Stromza; but it is considered as unhealthy. It is surrounded with walls, which are in a neglected state. It contains ten mosques, several Greek and Armenian churches, and about thirty thousand inhabitants. It is the chief market for cotton wool, which is extensively cultivated on the fertile plains around it. It has also a considerable trade in rice, tobacco, and fruits of all kinds.