Thracian Tomb of Sveshtari

The Thracian Tomb of Svestari (Sveshtarska grobnitsa) is 2.5 kilometers (1.6 mi) southwest of the village of Sveshtari, Razgrad Province, which is 42 kilometers (26 mi) northeast of Razgrad, in northeast Bulgaria. The tomb is probably the grave of Dromichaetes (Ancient, Dromichaites, c. 300 – c. 280 BC) who was a king of the Getae on both sides of the lower Danube (present day Romania and Bulgaria) around 300 BC, and his wife, the daughter of King Lysimachus (Lysimachos, c. 360 – 281 BCE) who was a general and diadochus (i.e, "successor") of Alexander the Great. The tomb is a UNESCO World Heritage Site.

Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).