Sea in culture of barbarian invaders and knowledge of geography took a backward step. In the seventh century, Isidore of Seville produced a "wheel map" in which Asia, Africa and Europe were arranged like segments in an orange, separated by the "Mare Mediterranean", "Nilus" and "Tanais" and surrounded by "Oceanus". It was not until the fifteenth century that Ptolemy's maps were used again and Henry the Navigator of Portugal initiated ocean exploration and maritime research. Encouraged by him, Portuguese navigators explored, mapped and charted the west coast of Africa and the Eastern Atlantic and this knowledge prepared the way for the great voyages
Europe-Asia Studies Europe-Asia Studies Europe-Asia Studies is an academic peer-reviewed journal published 10 times a year by Routledge on behalf of the Institute of Central and East European Studies, University of Glasgow, and continuing (since vol. 45, 1993) the journal Soviet Studies (vols. 1-44, 1949–1992), which was renamed after the dissolution of the Soviet Union. The journal focuses on political, economic and social affairs of the countries of the former Soviet bloc and their successors, as well as their history in the 20th century. Both Europe-Asia Studies and Soviet Studies are available online with subscription via JSTOR from 1949 onwards. Recent issues