An interesting detail can be found in the bottom right corner of this illustration from the second prologue of Augustine’s The Heavenly City and the Earthly City, where one can see townsmen paying for their drinks with coins. (Koninklijke Bibliotheek – Nationale bibliotheek van Nederland, The Hauge, MMW, 10A 11 fol. 6r http://manuscripts.kb.nl/zoom/BYVANCKB:mimi_mmw_10a11:006r_min_2)