The definition of Ruritania:

Ruritania is a fictional country in central Europe which forms the setting for three books by Anthony Hope: The Prisoner of Zenda (1894), The Heart of Princess Osra (1896), and Rupert of Hentzau (1898). The kingdom is also the setting for sequels and variations by other writers, see here for homages. It lent its name to a genre of adventure stories known as Ruritanian romances, and is used in academe to refer to a hypothetical country.

Take that to your next cocktail party.