Complex sentence: Wyke Castle is a Victorian property built in Portland stone by a Dr. Andrew Fenoulhet (1820--1862) around 1855, heavily influenced by the design of a Martello Tower.
Split into simpler sentences: Wyke Castle is a Victorian property built around 1855 out of Portland stone by a Dr. Andrew Fenoulhet (1820--1862). The design of the castle was heavily influenced by the standard design of a Martello Tower.