Phillipos Monotropos or Philippus Solitarius ("Phillip the Recluse"; Ancient Greek: Φίλιππος ο Μονότροπος; fl.
c. 1080) was a Byzantine monk and writer, notable for his authorship of the Dioptra ("The Mirror"), written towards the end of the eleventh century.
The 5-volume Dioptra is a compendium of prose and verse for the education of the next generation.
In the first volume a sinful monk repents to his soul.
In the four following volumes a dialogue continues between body and soul.