Plovdiv has recently enjoyed a spate of popularity in the international media with many famous publications naming it as one of the oldest continually inhabited cities in Europe. It has changed its name many times through its long history:

Kendrisos/Kendros (presumed) 4000 B.C.

Evmolpias/Eumolpia 1200 B.C. - the Thracians named the city after their mythical king Eumoplas, son of Poseidon.

Philipoppolis 342 B.C. - Philip of Macedonia named the city after himself.

Pulpudeva - when the Thracians won their city back they named it Pulpudeva, which is a translation of Philippopolis.
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Trimontium - the Romans named the city Three Hills when they took over in 42 A.D.

Puldin/Ploudin/Pulden/Populdin - the name given to the city by the Slavs after the fall of the Roman Empire.

Filibe - the city was known as Filibe during the Ottoman Empire.

Plovdiv - the name was first mentioned in the 11th century but was replaced by Filibe during the Ottoman Empire and reinstated after the city's liberation.