“…(1) database (DB CHH) for presentation of integrated knowledge of the 7 sites of Bulgarian CHH under UNESCO's protection (Boyana Church, Madara Rider, Thracian tomb near Kazanlak, Rock Churches of Ivanovo St. Archangel Michael Monastery, Rila Monastery, Old Town of Nessebar, Thracian Tomb near Sveshtari), and an information resource for presentation of the organization UNESCO (Kovacheva S. , 2016);…”