Religious minorities
Sociologically speaking, the following groups are present in Greece:
Muslims: 300 000 à 400 000, among which 100 000 in Thrace (North of Greece) and 200 000 à 300 000 immigrants concentrated especially in great urban centres
Catholics: 50 000
Jehovah’s Witnesses: 46 000
Protestants: 25 000
Jews: 5 000
Old Calendarists: 700, 000 to 1 million (traditionalist Orthodoxy that underwent a schism with the New Calendarist Western Christians in 1923)
Source : Greek Helsinki Monitor/GHM - Minority Rights Group – Greece/MRG-G, "Religious Freedom in Greece", septembre 2002.