Acroenus vel nomine Graeco recentiori Nicopolis est urbs Turcorum cuius nomen notior Afyonkarahisar transfertur nigrum opii castellum: Papaver somniferum enim in agris urbem cingentibus colitur.
Speros Vryonis, The Decline of Medieval Hellenism in Asia Minor and the Process of Islamization from the Eleventh through the Fifteenth Century (Berkeleia: University of California Press, 1971) p. 20.
Acroenus
