Around 420, Ostoher expanded the citadel of Minas Anor. Reconstructing the citadel was a massive undertaking (some sources suggest that it took as long as ten years), and might have been the source of Ostoher's royal name. After the construction was finished, he took Minas Anor as his summer residence, a tradition carried on by his successors.
Much later in his reign, Gondor suffered its first serious assault since the defeat of Sauron some five centuries before. In 490 bands of Easterlings appeared, threatening the region of north Ithilien. By this time Ostoher was an old man, and he sent his heir Tarostar to meet the threat. Tarostar was successful, but the campaign took 10 years, so Ostoher never his son's victory.
Ostoher was succeeded by his son, who took the name Rómendacil ("East-victor") to celebrate his triumph.
Anardil | | OSTOHER | | Tarostar (also known as Rómendacil I)
|King of Gondor