Ancient history of Transylvania
In ancient times, Romans exploited the gold mines in what is now Transylvania extensively, building access roads and forts to protect them, like Abrud. The region developed a strong infrastructure and economy, based on agriculture, cattle farming and mining. Colonists from Thracia, Moesia, Macedonia, Gaul, Syria, and other Roman provinces were brought in to settle the land, developing cities like Apulum and Napoca into municipiums and colonias.
Source: Wikipedia
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