Complex sentence: The river Pedieos used to flow through the Venetian walled city, but in 1567 it was later diverted outside onto the newly built moat for strategic reasons, due to the expected Ottoman attack.
Split into simpler sentences: The river Pedieos used to flow through the Venetian walled city. In 1567 it was later diverted outside onto the newly built moat for strategic reasons, due to the expected Ottoman attack.