The temple dates back to the V century BC. Its floor is made of specially arranged flagstones. The round part in the middle is indented and symbolizes the sun. The three concentric circles, surrounding the main Thracian symbol of life, are related to the Thracian ideas of the construction of the Universe – the underworld, the terrestrial and the celestial worlds. The temple has been looted already in antiquity but still small parts of golden jewelry were discovered in the gaps between the stone blocks.
The temple in the “Golyama Arsenalka” Mound, near the village of Sheynovo, was discovered on August 31st, 1995. It is built of perfectly cut stone blocks. It has a representative facade facing southeast, with an entrance, once closed with a two-winged stone door. It leads to a rectangular antechamber covered with a double-slope ceiling. The bones found in the first room provide evidence that a horse was offered as a sacrifice there. The second entrance, also with a double-winged stone door, leads to the central room, which is with circular shape and a dome cover. The floor of the second room is of particular interest because of the significance of the arranged flagstones. The concave central part, surrounded by the stone plates, represents the main Thracian symbol of divinity – the sun. It is the center of the Universe, the structure of which is also represented by the other three concentric circles that surround it. According to the Thracian beliefs, the vertical structure of the Universe is built of three worlds – the underworld, the terrestrial and celestial worlds. Located in front of the entrance is the ritual bed made of massive well-cut stone plates. The pieces found in the gaps between the plates are from a gilded breastplate with two golden ornaments in the form of small bees.