Gormenghastian

adjective1

1. •
   Resembling or pertaining to Gormenghast, an enormous sprawling Gothic castle mired in inexplicable traditions, introduced in a series of novels by Mervyn Peake (1911-1968).

   • The setting, a Gormenghastian castle, is rich with expectancy, and so is quite a lot of the language […] — 1957