In architecture, arbalestena (also known as balistraria) are cruciform apertures in the walls of ancient fortifications through which arrows were discharged by the defenders against attacking armies. Found on http://www.probertencyclopaedia.com/browse/TA.HTM
In architecture, arbalestena (also known as balistraria) are cruciform apertures in the walls of ancient fortifications through which arrows were discharged by the defenders against attacking armies.