Birko Birlesik Koyunlulular Mensucat Ticaret ve Sanayi A.S. manufactures and sells carpets under the Koyunlu Carpet brand in Turkey and internationally. It offers range of carpets, including lyre, Tryana, Kemerhisar, Silk Authentic, Silk, enjoy, alliance, and Aria. The company was incorporated in 1972 and is based in Nigde, Turkey.