The old town in Plovdiv is an architectural and historical reserve located on three of Plovdiv's hills: Nebet Tepe, Dzhambaz Tepe and Taksim Tepe.
The complex has been formed as a result of the long sequence of habitation from prehistoric times to present day and combines the culture and architecture from Antiquity, Middle Ages and Bulgarian revival. The old town in Plovdiv is included in UNESCO World Heritage tentative list since 2004.
Wikipedia https://en.wikipedia.org/wiki/Old_Town_(Plovdiv)
Official website http://www.oldplovdiv.com/
Address Staria Grad, 4000 Plovdiv, Bulgaria
Coordinates 42°9'0.781" N 24°45'0.947" E