The Neuschwanstein Castle. This was the castle of mad King Ludwig II (Ludwig Friedrich Wilhelm). Crowned at age 17, he stayed in this castle for all of 170 days. Though he was born in 1845, the castle was not started until 1869 and then completed just before his death in 1886. Ludwig built three castles in his lifetime: Neuschwanstein, Linderhof, and Herrenchiemsee.