Pella pĕl´ə [key], ancient city of Macedon , about 24 mi (39 km) NW of Thessalonica (now Thessaloníki). It became the capital of the Macedonian kingdom in the 4th cent. BC It prospered under Macedonian rule but declined after the Roman conquest of Macedonia (168 BC). Alexander the Great was born at Pella. Modern excavations have revealed a grid pattern of large houses decorated with a variety of mosaics.
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