The grand temple and its name is unique, built by Morfred as his crowning achievement dedicated to Selune while Ketheric and his family were still alive and naturally Selunites.
The reason why it's called tower(s) though is because it's not just one tower, but 9 actually. The main tower where Ketheric is found is its grand temple reaching for Selune's tears, but surrounding it are 8 more towers which go all the way down to the very foundation, thus being Moonrise Towers.
The one with the faded Absolute symbol also has a unique comment for the first party member that visits it.Also if interested in more lore regarding Morfred and the towers;
Morfred can actually be found and talked to in the House Of Hope, he is the unnamed debtor skeleton walking around the main hall's dining table and is the reason why Raphael unleashed Yurgir and his Merregons upon Ketheric's Sharrans, after which Ketheric unleashed the curse as a last resort out of despair.
He eternally doomed his soul without a single moment of regret just to save everyone threatened by Ketheric and simultaneously stick it to him, an absolute gigachad of a man and a rebel to the very end in both life and death. Have tremendous amounts of respect for him, really great character.