In Bulgaria I went to the Valley of the Thracian Kings, so called because several Thracian royal tombs have been unearthed there since 1965. The most famous tomb is located in the town of Kazanluk. We walked through the terraced Tylube Park to see mural paintings of the Kazanluk Vault which are considered to be masterpieces of Thracian paintings of the end of the 4th century.