Walachia and Moldavia remained isolated and primitive for many years after their founding. Education, for example, was nonexistent, and religion was poorly organized. Except for a rare market center, there were no significant towns and little circulation of money. In time, however, commerce developed between the lands of the Mediterranean and the Black Sea region. Merchants from Genoa and Venice founded trading centers along the coast of the Black Sea where Tatars, Germans, Greeks, Jews, Poles, Ragusans, and Armenians exchanged goods. Walachians and Moldavians, however, remained mainly agricultural people.