Beglik Tash (Bulgarian: Беглик Таш, Turkish: Beylik Taşı) is a prehistoric rock sanctuary situated on the southern Black Sea coast of Bulgaria, a few kilometers north of the city of Primorsko.

At the end of the 19th century, the Czech-Bulgarian historian and archaeologist Karel Škorpil produced the first scientific account of the sanctuary, which was then known as Apostol Tash.

The meaning of Beglik Tash is probably related to the "beglik," which is the tax on sheep collected by Ottoman authorities until 1913, and a Turkish word to describe an area made of large stones, "taşlar"[2] – a natural rock-formation consisting of megaliths of hardened magma that erupted from a Mesozoic era volcano.

According to the Bulgarian archaeologist Alexander Fol some of the Thracian womb-caves had the property of letting the sunlight in only at certain times of the day, a natural phenomenon seen by the Thracians as acts of symbolic fertilization of the Earth womb or the Mother Goddess by the sun phallus of the Sun God.

[3] Beglik Tash is located in the vicinity of two other Thracian sites: the city of Ranuli and the fortress of Pharmakida in the Strandzha Mountains.