During this time, the number of Greek schools in the Balkans, the Aegean islands and the coasts of Asia Minor made Korais estimate that there is no city or town without a school. Some of these schools had imposing buildings, a library, and a physics and chemistry laboratory. Next to the science courses, which had become the focus of education, ancient writers, and ancient history are taught, while geography has also become a valuable lesson. The need to use the demotic language instead of the archaic language becomes prevalent, a conclusion favored by significant scholars such as Daniel Filippidis and Athanasios Christopoulos. The construction cost and the running of the schools were undertaken by Greek merchants of the diaspora, professional guilds, communities, while the Church played a supporting role. The most well-known schools were in Ioannina, Ambelakia, Chios, Bucharest, Iasi, Izmir, Kydonia (Aivali), Dimitsana, Zagora, Milia in Pelion, etc.