Plovdiv city was originally a Thracian settlement and subsequently was invaded by Persians, Greeks, Celts, Romans, Goths, Huns, Bulgars, Slavs, Rus people, Crusaders, and Turks. On 4 January 1878, Plovdiv was liberated from Ottoman rule by the Russian army. It remained within the borders of Bulgaria until July of the same year, when it became the capital of the autonomous Ottoman region of Eastern Rumelia. In 1885, Plovdiv and Eastern Rumelia joined Bulgaria. Plovdiv is situated in a fertile region of south-central Bulgaria on the two banks of the Maritsa River. The city has historically developed on seven syenite hills, some
Plovdiv It attracts more than 600,000 visitors from many countries. The city has had a duty-free zone since 1987. It has a customs terminal handling cargo from trucks and trains. Plovdiv's geographical position makes it an international transport hub. Three of the ten Pan-European corridors run into or near the city: Corridor IV (Dresden–Bucharest–Sofia-Plovdiv- Istanbul), Corridor VIII (Durrës-Sofia-Plovdiv-Varna/Burgas), and Corridor X (Salzburg–Belgrade-Plovdiv-Istanbul). A major tourist centre, Plovdiv lies at the foot of the Rhodope Mountains, and most people wishing to explore the mountains choose it as their trip's starting point. The city is a major road and railway hub in southern