Charlemagne's black stones : the re-use of Roman columns in early medieval Europe /

What were the 'black stones' about which Charlemagne wrote to King Offa of Mercia just before AD 800? How do these special blocks fit into the broader pattern in re-using Roman columns in early medieval buildings?

Bibliographic Details

Main Author:	Peacock, D. P. S.
Format:	Analitica de revista
Language:	English
Subjects:	ANTROPOLOGIA