In the 14th and 15th centuries, the cities of Albania marked a slight but permanent progress. A number of new urban centers appeared around the coasts and river valleys. The Albanian cities were distinguished with development of craftsmanship, in particular the craftsmanship of jewelry, furring, carpentry, construction and gunsmithing. Craftsmanship development also induced internal and foreign trade, particularly with the Italian trade cities and with Dubrovnik. The internal trade was developed through the old and new trading routes, influencing positively the significant connections of ethnic Albanian provinces.