This tower is a most interesting facet of the Castle, as it was totally dedicated to Garderobes (medieval latrines) on an almost monumental scale.
This lavish provision was a rare facility in castles and houses of the period.
There are twelve Garderobes, four on each floor, each having a pointed arch to the recess, in which are stone corbels to carry the seats. The shafts discharged into a pit below, through which a stream of water could be diverted to flush it clean.
The number of Garderobes suggests that Langley Castle was intended from its inception to be well garrisoned, being more than just a family residence.
These Garderobes are perhaps the finest remaining examples of this type and style of architecture in Europe.