風雲頂於辛達林語(Sindarin)中被稱為阿蒙蘇爾(Amon Sûl,又譯阿蒙蘇、蘇爾山[a]),意思是「風的山丘」(Hill of Wind)。[3]在北方王國亞爾諾(Arnor)的歷史上,風雲頂佔有頗重要的地位。因為風雲頂曾是王國的重要前線要塞、一枚真知晶石(Palantír)的存放點及幾場重要戰役的發生處。
在1356年,魯道爾 (Rhudaur)已淪為山地人和邪惡的控制下,聯軍安格馬(Angmar)攻擊風雲頂,雅西頓的亞瑞吉來布一世(Argeleb I )在防禦戰中被殺。其子亞維力格一世(Arveleg I )擊退敵軍,並防衛了風雲頂許多年。1409年,安格馬再度突襲北方王國,卡多蘭被消滅、風雲頂被敵人大軍圍困,亞維力格陣亡,阿蒙蘇爾瞭望塔也被燒成白地。儘管阿蒙蘇爾瞭望塔傾覆了,但是阿蒙蘇爾的晶石被救出,遷到首都佛諾斯特 (Fornost)。[7]
^ 4.04.1《未完成的故事》"The Palantíri" P. 413:「... Amon Sûl, whose Stone was held to be the chief of the Northern palantíri, being the largest and most powerful and the one through which communication with Gondor was mainly conducted...」
^《未完成的故事》"The Palantíri" P. 411:「...certainly the Stones of Osgiliath and Amon Sûl, were much larger ... standing on low round tables of black marble in a central cup or depression...」
^《未完成的故事》"The Palantíri" P. 413:「The Kings of Arthedain, who were plainly those with the just claim, maintained a special warden at Amon Sûl, ...」
^《未完成的故事》"The Palantíri" P. 413:「After the destruction of Amon Sûl by Angmar in 1409 both Stones were placed at Fornost, where the King of Arthedain dwelt.」"both stones"指阿蒙蘇與阿努米那斯的兩枚晶石。