Dol Guldur

In the fictional world of J. R. R. Tolkien's Middle-earth, Dol Guldur, or Hill of Sorcery, was a stronghold of Sauron located in the south of Mirkwood.

Dol Guldur was established by Sauron after his return to Middle-earth somewhere after 1000 Third Age, although his identity was long unknown. Dol Guldur was originally known as Amon Lanc (bald hill), and had been the capital of Oropher's Silvan Elves, who had departed north to the Black Mountains (Later Mountains of Mirkwood). After Sauron took over Amon Lanc Thranduil son of Oropher led his people over the Forest river, where they remained.

The Council of the Wise long feared the power in Dol Guldur might be Sauron, and in 2063 Gandalf went to Dol Guldur, and Sauron, not yet powerful, fled to the east. In 2460 Sauron returned there, just as the One Ring was found by Sméagol the Stoor. However, the Ring disappeared with Sméagol under the Hithaeglir.

In 2845 Thráin II, King of Durin's folk in exile and holder of the last of the Seven Rings of the Dwarves, was imprisoned in Dol Guldur's dungeons. In 2850 Gandalf again entered Dol Guldur, finding the dying Thráin, and Gandalf was entrusted with the map and key to give to Thorin Oakenshield, although Thráin could not tell him his own or his son's name before he died. Gandalf confirmed Sauron was the master of Dol Guldur at that time.

Gandalf returned to the White Council and urged an attack on Dol Guldur, but was overruled by Saruman, who had begun searching for the One Ring in the area by then. In 2941 Saruman finally agreed to an attack, which occurred at the same time as the Quest for Erebor. This was carefully planned by Gandalf, so that Sauron and Smaug could not assist each other, as otherwise they surely would have done. Sauron fled to Mordor, his plans now ready. Dol Guldur remained staffed by Khamûl, a lieutenant of Barad-dûr.

During the War of the Ring, the forces of Dol Guldur made three assaults upon Lórien, causing grievous damage to the outlying woodlands, but were driven back each time by the power of Nenya which only Sauron himself could have overcome. Dol Guldur was finally destroyed and cleansed by the Elves of Lórien, led by Galadriel, after Sauron's fall. Renamed back to Amon Lanc it became the capital of Celeborn's realm of East Lorien for a while.