This March 2008 domestic rate issue of private courier New Zealand Mail (NZM) depicts Larnach Castle in Dunedin, NZ. This is a private residence built at a time when the "Chalon" stamps were in use in the country.
From Wikipedia, "Larnach Castle is a mock castle...built by the prominent entrepreneur and politician William Larnach... The Godfrey family carved many of the building's intricate ceilings; a single ceiling in the main foyer took six and one half years to complete. In 1875, twenty tonne of glass was imported from Venice, in an effort enclose exposed verandas for Dunedin winters. An addition to the 3000 square foot ballroom was made in 1887; a 21st birthday present for Larnach's eldest daughter Kate. The resulting complex eventually contained 43 rooms and required 46 servants."