Clackmannan Tower dates from c1360 and was built by the Bruce family. In the 15th century the building was raised to its current height and the taller south wing was constructed. A new mansion was built to the west of the tower in the late 16th century and in the 17th century further changes were made to the tower. Lady Catherine Bruce, the last of the family, lived in the mansion until her death in 1791. The tower has been in the guardianship of the State since the 1950s and is managed on its behalf by Historic Environment Scotland, which has undertaken extensive repairs. Further improvements have been carried out recently as part of the Inner Forth Landscape Initiative (IFLI). New internal barriers have improved safety for visitors, the scaffolded staircase has been removed and new lighting has been installed.