▁colonial ▁Hong ▁Kong ▁- ▁although , ▁in ▁both ▁colonial ▁Hong ▁Kong ▁and ▁the ▁Hong ▁Kong ▁Special ▁Administr ative ▁Region , ▁Victoria ▁is ▁the ▁only ▁city ▁recogn ised ▁by ▁law ; ▁they ▁were ▁widely ▁considered ▁to ▁be ▁separate ▁cities ▁until ▁at ▁least ▁the ▁mid - 1 9 7 0 s ▁ ▁Sa ig on ▁and ▁Ch ol on , ▁merged ▁into ▁Sa ig on - Ch ol on , ▁now ▁Ho ▁Chi ▁Min h ▁City . ▁ ▁Wu han ▁( mer ger ▁of ▁W uch ang , ▁H ank ou , ▁H any ang ) ▁ ▁Europe ▁ ▁Current ▁▁▁ ▁N ør res und by ▁and ▁A al borg , ▁Den mark ▁ ▁B ourn em outh ▁and ▁Po ole , ▁United ▁Kingdom ▁ ▁Bright on ▁and ▁H ove , ▁United ▁Kingdom ▁ ▁Ch ath am ▁and ▁Ro chester , ▁United ▁Kingdom ▁ ▁Le eds ▁and ▁Brad ford , ▁United ▁Kingdom ▁ ▁Manchester ▁and ▁S alf ord , ▁United ▁Kingdom ▁ ▁New castle - up on - Ty ne ▁and ▁G ates head , ▁United ▁Kingdom ▁ ▁Porto ▁and ▁V ila ▁Nova ▁de ▁Ga ia , ▁Portugal ▁ ▁P ó vo a ▁de ▁V arz im ▁and ▁V ila ▁do ▁Con de , ▁Portugal ▁ ▁Ludwig sh afen ▁and ▁Mann heim , ▁Germany ▁ ▁Main z ▁and ▁Wies b aden , ▁Germany ▁ ▁Ul m ▁and ▁Neu - U lm , ▁Germany ▁ ▁S ind elf ingen ▁and ▁B ö b lingen , ▁Germany ▁ ▁Frankfurt ▁and ▁Off en bach , ▁Germany ▁ ▁N