The rock bas-relief of the Madara Knight representing a horseman with a sceptre in the right hand and a shepherd's crook in the left; a lion, a dog and a snake are depicted under the horse. It was considered a symbol of the victorious march of Bulgarian rulers at the dawn of the Bulgarian state. The latest approach to the inscription is based on the Persian (East Indo-European) heritage. The horseman is the Earth correspondence of the Sun, the dog - of the Moon, the lion refers to the Lion constellation with the Regul main star. The computer analysis based on the latest software related to astronomy implies that the position of the Sun, the Moon and the Regul star as is on the bas-relief, has happened in 165AD (the year of the Snake). This year amazingly coincides with the year considered a beginning of Bulgarian statehood, as specified in the Name List of Bulgarian Khans, a written monument of the 8th century. These lead to the conclusion that Bulgarians have Indo-European roots and culture and are a highly civilized state-founding people. This unique monument of worldwide importance is under the protection of UNESCO.