books.google.co.uk - Ferdinand Gregorovius (1821-1891) was a celebrated German medieval historian. After studying philosophy and theology at the University of Königsberg, Gregorovius moved to Rome in 1852, and became immersed in researching the medieval history of the city. First published in 1872, his monumental study...http://books.google.co.uk/books/about/History_of_the_City_of_Rome_in_the_Middl.html?id=8z2ZEOE-azoC&utm_source=gb-gplus-shareHistory of the City of Rome in the Middle Ages
