Staro Zhelezare Stone Circle was discovered in 2001 by late Bulgarian archaeologist Georgi Kitov. It consists of 24 of different size standing stones (of which 2 are missing) arranged in a proper circle and is 6 meters of diameter
See:
- http://archaeologyinbulgaria.com/background-infonotes/shrines/thracian-cromlech-stone-circle-staro-zhelezare-bulgaria/
- http://www.balkanmegaliths.bgjourney.com/Bulgaria/Menhiri/CROMLEHS/Staro_Jelezare/StaroJelezare.html
- Georgi Kitov, „Тракийски култов център Старосел”, изд. Славена, Varna 2003
- idem: Могили, храмове, гробници (записки на един могилар)”, изд. ТЕМП, С., 2008