In which region did Pliny the Younger serve as governor?

Pliny the Younger served as governor of Bithynia, a region located in what is now northwest Turkey, during the early second century AD. His tenure as governor is significant not only for the administration of the province but also for the letters he wrote during this time, which offer valuable insights into Roman provincial governance and life. In particular, Pliny’s correspondence with Emperor Trajan includes discussions about local issues, such as the trials of Christians and the administration of justice, illustrating his responsibilities and the political landscape of the time.

Bithynia was known for its strategic location and economic activity, which presented unique challenges and opportunities for its governance. Pliny's experiences and recorded observations in this region have contributed considerably to the historical understanding of Roman governance.

The other regions mentioned—Achaea, Sicily, and Hispania—were also important parts of the Roman Empire, but Pliny was not known to have governed these areas. Instead, these regions had their own respective governors and administrative contexts, which differ from Pliny’s experiences in Bithynia.