Tsarevets (fortress)

Tsarevets (Bulgarian: Царевец) is a medieval stronghold located on a hill with the same name in Veliko Tarnovo in northern Bulgaria. Tsarevets is 206 metres (676 ft) above sea level.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.^[2]

• http://en.wikipedia.org/wiki/Tsarevets (fortress)