Dover on Wikipedia.

Bill Beer's Dover web-site features many churches.
 

Gateway Christian Fellowship (Pentecostal Assemblies of God) photographed in 1991. © Alan Taylor.

St. Columba (U.R.C.). © Bill Henderson.

St. Mary the Virgin. © Bill Henderson. Another view, from an old postcard, Bulman Collection. Link.

St. Mary in the Castle. © Bill Henderson.

St. Paul (R.C.). © Bill Henderson.