At the initiative of the National Endowment Fund “13 Centuries Bulgaria” – the ethnographic complex “Hadji-Danchovi Houses”, Sliven, and the Public Donors’ Fund – Sliven, on 21 October 2016, a race for finding “The Treasures of the Hadji-Danchovi Houses” was opened. Two teams of children aged 8 to 13 years from “Art Center 7” and from schools in Sliven took part in the competition. They measured their Knowledge about the history of the city, speed and wits in the adventure.