Tsarevets (Bulgarian: Царевец) is a medieval stronghold located on a hill with the same name in Veliko Tarnovo in northern Bulgaria. It served as the Second Bulgarian Empire's primary fortress and strongest bulwark from 1185 to 1393, housing the royal and the patriarchal palaces, and is a popular tourist attraction.
The Sound and Light (Звук и светлина, Zvuk i svetlina) audiovisual show is an attraction carried out in the evening that uses three lasers, variegated lights, dramatic music and church bells to tell the story of the fall of Tarnovo to the Ottomans, as well as other key moments of the history of Bulgaria. The large-scale show has been organized at Tsarevets since 1985, when the 800-year anniversary of the Uprising of Asen and Peter was celebrated. It was designed and planned by a Bulgarian-Czechoslovak team led by Valo Radev and Jaromir Hnik.