The main attraction in Eisenach is this WARTBERG CASTLE. Richard Wagner based his opera TANNHAUSER on a minstrel's contest taking place in the castle in 1206-07. This castle was also the residence of the much loved Elisabeth of Thuringia, who was canonized after her death in 1235 for rejecting a pompous court lifestyle in favor of helping the poor and disadvantaged.In 1521-22, the reformer, Martin Luther went into hiding in the castle, under the assumed name of Junker Jorg after being excommunicated and put under a papal bull.
Being a Lutheran,I found this place fascinating, especially being in the actual room where Luther lived and translated the New Testament from the original Greek to German.
You can take a tour of the CASTLE..THE GREAT BANQUET HALL IS well worth the visit alone.
The castle was very crowded when I was there at the end of July.There is a small admission charge.