Itanagar April 21: The three-day maiden Thembang Heritage Festival concluded on Saturday in the picturesque Thembang village in West Kameng district of Arunachal Pradesh, which has been enlisted as a World Heritage Site by the UNESCO. Addressing the closing ceremony, PHED, WS and Economics Parliamentary Secretary Kumsi Sidisow and former minister D K Thongdok recalled the historic relevance of the fortified Dzong that was built by using traditional technology of the region.