books.google.com - This is a reprint of the second revised edition of the text and translation of the De Administrando Imperio written and compiled by Emperor Constantine VII Porphyrogenitus in the tenth century. It contains a wide variety of information on both foreign relations and internal administration and is one...http://books.google.com/books/about/Constantine_Porphyrogenitus_De_administr.html?hl=de&id=3al15wpFWiMC&utm_source=gb-gplus-shareConstantine Porphyrogenitus De administrando imperio
