With impressive 15-foot (4.6m) ceilings, the apartment contains some of the grandest rooms in the building, including a spacious master bedroom. The room sits in the base of the clock tower and boasts an open-air ensuite, located on a mezzanine level.

Upstairs, there’s a large kitchen and dining room and the clock tower room, which lies immediately beneath the clock chamber. A rickety metal staircase leads directly up to the clock maintenance rooms, where the original winding room for the mechanical clock still sits.

Its important features include a fireplace, ceiling decorations and pointed arch windows, each of which is intricately decorated with Gothic Revival tracery. You can take a tour of the apartment on YouTube.

Discover the most fascinating secret dwellings on earth