Corfe Castle is a fortification on the Isle of Purbeck peninsula in Dorset. Built by William the Conqueror, the castle dates to the 11th century.  The first phase was one of the earliest castles in England to be built at least partly using stone when the majority were built with earth and timber. Corfe Castle underwent major structural changes in the 12th and 13th centuries. Though this sepia card looks almost as old, it’s not, having been mailed in 1958 with stamp and postmark.  Grade: 1