Bohemia was a European monarchy in at least the 16th, 17th and 19th centuries.
Geography
Bohemia was located in Central Europe, (AUDIO: Grand Theft Cosmos) and in central Bohemia were Castle Houska and Kokorin Forest. (COMIC: Herald of Madness)
History
The historical records of the 16th century had it that the Revelation Sect was a joint creation of the kings of Bohemia and the Holy Roman Empire, when in reality it was founded by the Clocksmith (AUDIO: The Eighth Piece) in 15th century Prague. (AUDIO: The Doomsday Chronometer)
In 1601, the Thirteenth Doctor, Graham O'Brien, Ryan Sinclair, and Yasmin Khan met Tycho Brahe and Johannes Kepler in Kokorin Forest. (COMIC: Herald of Madness)
In 1898, the Headhunter posed as Elizabeth of Bohemia in order to gain access to Drottningholm Palace. (AUDIO: Grand Theft Cosmos)
References
While in-disguise and hiding from the debt collector Harry Edwards, Henry Gordon Jago put on what George Litefoot thought was a Bohemian accent. (AUDIO: The Bellova Devil)