The 15th and 16th centuries are known as the classical period of Ottoman architecture. Settlements were founded in Macedonia that were purely Muslim in character, such as the sacred city of Yenice (present-day Yannitsa) and the village Yeni Pazar (present-day Apollonia).
Urban centres held by the Turks, like Thessaloniki and Serres, were endowed by the sultans and the officials of the Sublime Porte with religious and public buildings such as mosques, Dervish monasteries, poor-houses, baths and covered markets.
The fortifications of Thessaloniki were strengthened with new strong-points adapted to artillery warfare (e.g. White Tower, Trigonion Tower, Vardari Fort). Thermal healing springs were also exploited by the erection of bath-houses at these spas (e.g. Langadas, Nea Apollonia).