Columbia subject headings:
Harvard subject headings:
Church and state--Europe--History
Democracy--Religious aspects--Christianity
Democracy--Religious aspects--Islam
Islam and politics--History.
Islam and state--History.
Religion and state--Europe--History.
Princeton subject headings:
Church and state--Europe--History.
Democracy--Religious aspects--Christianity.
Democracy--Religious aspects--Islam.
Islam and politics--History.
Islam and state--History.
Religion and state--Europe--History.