White Pillar

The White Pillar was a monument erected by the Kings of Gondor outside the city of Umbar, celebrating the landing of Ar-Pharazôn in Middle-earth and his humbling of Sauron. The monument took the form of a pillar of white marble surmounted by a crystal globe which captured the rays of the sun and moon. The light of the monument could be seen from the coasts of Gondor to the north.
The monument was built after Gondor captured Umbar from the Black Númenóreans, likely after the ending of the Siege of Umbar in TA 1050. It celebrated the power of Númenor and the humiliation of Sauron. For that reason it was torn down sometime after the return of the Dark Lord to Mordor in TA 2951.