Xystum
From Wikipedia, the free encyclopedia
A Xystum is an architectural term. It can refer to a wall, promenade, alley or open path. It can also refer to an atrium, ambulacrum or parvis in front of a basilica.
[edit] Source
Curl, James Stevens [2006]. A Dictionary of Architecture and Landscape Architecture (Paperback), Second (in English), Oxford University Press, 880. ISBN 0-19-860678-8.