The city prospered as piracy was eliminated and technological advances were introduced, consequently ''Felicitas Julia'' became a center of trade with the Roman provinces of Britannia (particularly Cornwall) and the Rhine. Economically strong, Olissipo was known for its garum (a fish sauce highly prized by the elites of the empire and exported in amphorae to Rome), wine, salt, and horse-breeding, while Roman culture permeated the hinterland. The city was connected by a broad road to Western Hispania's two other large cities, Bracara Augusta in the province of Tarraconensis (Portuguese Braga), and Emerita Augusta, the capital of Lusitania. The city was ruled by an oligarchical council dominated by two families, the Julii and the Cassiae, although regional authority was administered by the Roman Governor of Emerita or directly by Emperor Tiberius. Among the majority of Latin speakers lived a large minority of Greek traders and slaves.