[German version]

(ξυστός/xystós; Latin xystus). In Roman Antiquity a walkway (ambulatio) or a terrace, usually an element of a hortus (garden) and hence part of a villa. According to Vitr. 5,11,4 such a xystus consisted of an unroofed path edged by plane trees. In a Greek gymnasiun, the original context of a xystus (in evidence there since the 5th cent. BC), in contrast, a covered running track was meant.

There is disagreement about the precise definition of a xystus in Roman architecture; sometimes (Varro Men. 162; Cic. Att. 1,4,2) it is only the course of a sp…