Tresendar Manor

Tresendar Manor was one of the largest buildings in Phandalin. During the 10th century DR, it was inhabited by the Tresendar family but was later abandoned. Long after its abandonment, in 1491 DR, a group called the Redbrand Ruffians, under the leadership of a wizard named Glasstaff whose real named was Iarno Albrek, occupied the manor as well as bugbears, goblins, and a nothic.
Although the uppermost rooms of the manor were unusable (such as the kitchen) after its abandonment, the basement garnered much usage by the bandits. As such, many additions were added to the cellar, such as barracks and workshops.
A few months later, Thel Dendrar, the local woodcarver, stood up to the group that occupied the manor. He was slain and fed to a nothic, while his family were captured and thrown into the slave pit. Later, Carp Alderleaf, a lad from Phandalin, managed to locate the secret entrance to the base via a tunnel.