Ottoman rule was not yet firm. The first period of Ottoman control lasted from 1393-1397, followed by another c. 1403, but it was not until 1423 that Volos was definitively incorporated into the Ottoman Empire. The Ottoman name of the city was . The Ottomans strengthened the town's fortifications against a possible Venetian attack, and installed not only a garrison, but also Muslim settlers from Anatolia. The local Christian population in turn moved to the slopes of Pelion. From this time on, Volos became the chief settlement on the Pagasetic Gulf.