From the Sofia Echo:

The archaeological expedition Strandzha discovered a labyrinth, similar to the famous labyrinth on the island of Crete.

The discovery was made near the village of Golyam Derven, close to the Bulgarian-Turkish border.

Archaeologists also found a skeleton of a ruler in the labyrinth, BGNES news agency reported.

Among the finds in the labyrinth were abundantly ornamented ceramics artifacts with unknown so far elements and bird figures.

This is the second unique discovery that the archaeologists made within a week. A few days ago, they found stone ornament, resembling double axe at the entrance of a tomb.

The ornament changed historians' ideas on the establishment of Thracian state in the region.


Novinite adds (sort of) some details:

[...]

The team of Professor Daniela Agre, who are doing excavation works in the area, stumbled upon the unique artefact while researching a an ancient Thracian tomb's entrance stone.

The labyrinth image, which is carved on the slate, is perfectly preserved.

The legendary labyrinth was considered a just a myth from the Greek mythology until the exclusive finding. According to the legends, King Minos ordered the construction of the labyrinth to keep inside the monstrous Minotaur.

The Greek mythology tells about a dispute over the sovereignty of Crete that led Minos to ask Poseidon for help. He asked the god to send an offering as a sign of his true kingship. The god of the sea sent a gleaming pure white bull, which emerged miraculously from the waves. This confirmed that Minos was a true king. However, as soon as King Minos saw the beast he refused to sacrifice it to Poseidon, and replaced it with another. Poseidon in retaliation sent Pasiphae into uncontrollable lust for this huge beast. So much so that she had the urge to mate with this huge animal. The result was the beast Minotaur.

King Minos ordered Daedalus to construct a palace to hide the Minotaur, and Daedalus built Labyrinth.