At the southernmost end is the so-called Baldwin Tower, named after Baldwin of Flanders, who was captured by Bulgarian Tsar Kaloyan in a battle against the knights of the Fourth Crusade in 1205.
Na najjužnijem kraju je takozvani toranj Boldvin, nazvan po Boldvinu od Flandersa koga je zarobio bugarski car Kalojan u bici protiv vitezova Četvrtog krstaškog rata 1205. godine.