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 European mosque outside Moorish Spain. The Sephardic Plovdiv Synagogue is at Tsar Kaloyan Street 13 in the remnants of a small courtyard in what was once a large Jewish quarter. Dating to the 19th century, it is one of the best-preserved examples of the so-called "Ottoman-style" synagogues in the Balkans. According to author Ruth E. Gruber, the interior of the Plovdiv Synagogue is a "hidden treasure…a glorious, if run-down, burst of color." An exquisite Venetian glass chandelier hangs from the center of the ceiling, which has a richly painted dome. All surfaces are covered in elaborate, Moorish-style, geometric designs in