on bergfrieds indicate, in some cases, that wooden superstructures were used. In the late Middle Ages, the tower roofs were often embellished with bartizans and other similar structures. Larger ballistic weapons or catapults were only rarely positioned on the fighting platforms. Large castles (e.g. Münzenberg Castle) and Ganerbenburgs (castles owned by more than one family simultaneously) sometimes had multiple bergfrieds for status or security reasons. Consisting of an inner bailey and two outer baileys, the very large castle of Neuenburg, the residence of the landgraves of Thuringia in Freyburg, Germany, used to have a bergfried in every part of the castle (the inner bailey and outer baileys 1 and 2), i.e. a total of three bergfrieds. The unusually large royal imperial castle of Kyffhausen Castle in the Kyffhäuser consisted of an upper bailey, a middle bailey and a lower bailey. In the upper and middle baileys, the two known bergfrieds have survived at least in remnants. Smaller castles sometimes had two bergfrieds too: the Kohren Castle in Kohren-Sahlis or the well-known Saaleck Castle at Bad Kösen, for instance. Octagonal bergfrieds A rare form is the octagonal bergfried. The first appeared in a few Hohenstaufen-era castles in Baden-Württemberg, in the Alsace region and in Lower Italy. The best known is the bergfried of Steinsberg Castle. Frederick II's tower in Enna has an octagonal bergfried with a symmetrical octagonal enceinte. The octagonal bergfried of Gräfenstein Castle can be considered a special case in which plinth on the side facing the line of attack has been extended to form triangle, making the tower heptagonal. In the post-Hohenstaufen period, octagonal bergfrieds appeared in Brick Gothic castles. The octagonal shape is adopted because of the brick construction, because angular shapes are preferred to round ones. A variant is the octagonal tower on a square plinth. Based on the castles of the Teutonic Order, this type of tower is also common in Central Poland (e.g. Brodnica, Człuchów, Lidzbark Warmiński). Occasionally Teutonic Order castles have such towers that are not executed in brick (e.g. Paide). Functions The bergfried was a multi-functional building that could have various defensive functions, but which also had status value. In the last decade of the 20th century there has been discussion in the field of castle research about whether the bergfried's functions could be succinctly stated as a "fortification or (more likely) a status symbol." This has not, however, gained universal acceptance.