It is a small façade on a rock called Balkayası near the village of Böğürtlen, 7 km north of Sivrihisar, Eskişehir. The façade engraved on a flat rock surface is approximately 2 m high and 1.5 m wide. Traces of red paint are still visible on the roof beams and niche frame. The niche is not too deep. According to some researchers, it is an incomplete monument. It probably dates to the 6th to 4th centuries BCE in Late Phrygian period.
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Berndt-Ersöz, S. 2006. Phrygian RockCut Shrines. Structure, Function and Cult Practice, Leiden.