The Athenian Agora 24; Late Antiquity A.D. 267-700; The Palace of Giants; Exploration and Identification; Southeast Court. Xenophon, de re equestri IV.I. Vitruvius VI.6.4. Rostovtzeff et al., Dura Europos, ... Agora 24 104 ... K. Anderson (Ancient Greek Horsemanship, Berkeley 1961), chapter VII