The fortress of Sauron, built by him with the power of the One Ring between SA 1000 and 1600. At the end of the Second Age it was besieged and captured , but its foundations could not be destroyed while the Ring survived. Sauron began to rebuild Barad-dur in TA 2951, but it was destroyed in 3019 when the Ring was unmade. Barad-dur was located at the southern end of a great spur of the Ered Lithui, and was the greatest fortress in Middle-Earth in the second and Third Ages.
Called in Orkish, Lugburz. and in Westron, The Dark Tower.
SA-second age
TA-third age