Konopiste Castle, The Heir to the Austro-Hungarian Throne and The Great War   Just 50 kilometers southeast of Prague in the Czech Republic, Konopiště Castle sits high atop a hill, surrounded by a thick forest.  Built as a Gothic fortification towards the end of the 13th century, it was a huge and sprawling rectangular edifice with plenty of towers, seven in all, for the most effective defense.  Over the centuries, the castle passed through the hands of numerous owners and…