Draft:Shattered Embrace:Tower of Lorren
Tower of Lorren was one of the ancient structures on Arveran that originally formed the Stone Crown. Although it was toppled down, as the city of Lorrendar around it sunk into the sea, it's basis is still visibile above the water of Cloudy Bay, and Freehaven was built atop of its ruins (with Laginu's outdoor office being located directly on it). It can be visited in Shattered Embrace DLC.
History
Originally it was a seat of power of Lord Lorren that ruled his Human domain on Karatree Reach from it during the Age of Heroes. It's initial function was to guide the Gate of Lorren.
It was destroyed by the Tenebrae during their attack on the city, but it's basis survived (and in time formed a key part of Freehaven's skyline). However, at the brink of the Age of Reconstruction, Lorren's son Baramir decided to abandon it and move to Shadinar (to rule from his new tower in the Palace of Hope).
In-game
The underground vault of the Tower is still connected to partially drowned corridors of the Sunken City, but the entrance to it was sealed by Maleno (Freehaven's original mayor). It can only be entered on Laginu's permission.