The early Byzantine province of Cappadocia I was established in central Asia Minor in 371, with Caesarea as its metropolis. It included the famous volcanic areas of the region. From the 6th century onwards the landowners of Cappadocia expanded their properties at the expense of both economy and population growth. The region was invaded by Tzans, Huns, Isaurian revolters, Persians and Arabs. In the 7th century it was annexed to the themes of Armeniakon and Anatolikon.