An inscription identifies Callicrates as one of the architects of the Classical circuit wall of the Acropolis (IG I3 45), and Plutarch further states (loc. cit.) that he was contracted to build themiddle of three defensive walls linkingAthens andPiraeus.
^Mark, Ira S. (1993).The Sanctuary of Athena Nike in Athens: Architectural Stages and Chronology. Princeton.{{cite book}}: CS1 maint: location missing publisher (link)
^"Callicrates".Gazetteer of Planetary Nomenclature.NASA. Retrieved10 March 2022.