Columbia subject headings:
Harvard subject headings:
Environmental law--Byzantine Empire--History--Sources.
Environmental protection--Byzantine Empire--History--Sources.
Law, Byzantine--History--Sources.
Urban policy--Byzantine Empire--History--Sources.
Princeton subject headings:
Environmental law--Byzantine Empire--History--Sources.
Environmental protection--Byzantine Empire--History--Sources.
Law, Byzantine--History--Sources.
Urban policy--Byzantine Empire--History--Sources.