Board Thread:Suggestions forum/@comment-29140374-20160718220741/@comment-9059376-20160720145612

"...in the midst of the land was a mountain tall and steep, and it was named the Meneltarma, the Pillar of Heaven, and upon it was a high place that was hallowed to Eru Ilúvatar, and it was open and unroofed, and no other temple or fane was there in the land of the Numenoreans." - The Silmarillion, Akallabêth

No structure was built on the peak of Meneltarma. The "temple" of Eru of which you speak was the hallowed and sacred mountain itself.