Denmark

Denmark was a nation in Europe.

Currency
The currency of Denmark was the Danish kroner. The Twelfth Doctor had 50 of those in a TARDIS drawer, which Nardole found. (TV: The Lie of the Land)

History
Prior to 1066, Cnut was the king of Denmark. After the Battle of Hastings in that year, Cnut's nephew Harold Godwinson, under the alias Hereward the Wake, considered forging an alliance with Denmark to attack London. (PROSE: The Real Hereward)

The Fourth Doctor's Five Hundred Year Diary had details on a bank holiday he once spent in Denmark. (PROSE: The Not-So-Sinister Sponge)

The Tenth Doctor told Martha Jones he had once seen Mika at a live concert in Denmark. (PROSE: The Pirate Loop)

At 8:40AM GMT on a Wednesday in September 2009, Denmark was among the numerous places across Earth in which RTAs occurred as a result of the 456 compelling every human child to suddenly stop and proclaim their message: "we are coming." (TV: Children of Earth: Day One)

Other references
Francis Bacon influenced playwright William Shakespeare to write "the history of Hamlet, Prince of Denmark. (TV: The Chase)

Going by his kilt, Zoe Heriot initially mistook Scotsman Jamie McCrimmon as being of Scandinavian origin, possibly Danish. (TV: The Wheel in Space)

Captain Jack Harkness claimed that the Gargantuan had pages the size of Denmark. (WC: )