Middle Earth Architecture

[The Saucepan Man]

Originally Posted by mark12_30

But does Helm's Deep qualify as a "tower"? It strikes me more as a fortress.

Well, the Hornburg was a castle and so had towers. But, no, it was not a tower in the same way that Orthanc or Barad-Dur were.

Originally Posted by gilgalad_the_Valiant

Im pretty sure the Rohirrim built Helms Deep, I think it was Helm Hammerhand.

It was built by the Gondorians when the Deeping Coomb formed part of their realm. It was within the land of Calenardhom granted by Cirion to Eorl, and so became a place of refuge for the Rohirrim. Helm Hammerhand and his people took refuge there when Rohan was invaded by Dunlendings, and the fortification as a whole (of which the Hornburg was a part) takes its "current" name from him.