Weimar was the capital of Germany during the disastrous Weimar Republic of the 1920s, and it is also famous for its association with the "golden age" of German classical culture. Today the city is filled with monuments to its former glory days. The Duchess Anna Amalia Library is one of those beautiful relics; its Rococo Hall is filled with busts of the literary giants who once roamed here. One of the library's most famous patrons was the poet, novelist, and natural scientist Johann Wolfgang von Goethe. The main building, called the Green Castle, was built between 1562 and 1565. In 2004, a fire destroyed the Green Castle's main wing along with 50,000 volumes, of which 12,500 were considered irreplaceable. However, some 6,000 historical works were saved, including the 1534 Luther Bible and a collection of natural scientist Alexander von Humboldt's papers, by being passed from hand to hand out of the building while the fire was raging. Restoration of salvaged volumes lasted until 2015.