"groups and places mentioned by Celsus were found in Asia.
"Celsus refers to places where “
gods are to be seen in human form”
(
Cels. VII, 35); they are in Boeotia, Greece, and Cilicia.
"Celsus also refers to miracles of Aristeas the Preconnesian, in northern Asia,
and “a certain Clazomenian,” (i.e., from near Smyrna;
Cels. III, 3).
"In a favorable reference to Asclepius foretelling the future,
Celsus named cities dedicated to him (
Cels. III, 3);
these cities are in Greece and Asia Minor, e.g., Pergamum.
"Angel worship plays a prominent role in Celsus’ condemnation
of Jews and Christians; this practice is attested in Asia Minor
(
Cels. I, 26 and V, 6; see Burke 1981: 139–40; Johnson 1975; Kraabel 1968).
"Celsus is the only source for a group of Sibyllists (
Cels. V, 61);
since such a group is otherwise unattested, they cannot be surely located,
but Phrygia (the birthplace of Montanism) was home to many “wandering prophets,”
who expected, and hoped for, an end to the world — the sort of people that worried Celsus".
http://people.duke.edu/~goranson/Celsus_of_Pergamum.pdf
Burke, GT. (1981) Celsus and Late Second Century Christianity.
Unpublished Ph. D. Dissertation. University of Iowa
Johnson, SE. (1975) Asia Minor and Early Christianity. pp. 77–145
in Christianity, Judaism and Other Greco-Roman Cults, vol. 2, ed. J. Neusner. Leiden: Brill.
Kraabel, AT. 1968 The Jews of Western Asia Minor under the Roman Empire.
Unpublished Ph. D. Dissertation. Harvard University