- Built by Hushang Shah, probably around A.D. 1425 as a Durbar hall.
- The walls are inordinately thick and slope like those of a castle. The slope of over 77 degrees gives a swinging appearance to the building, hence the name.
- The plan is 'T' shaped. The upright stem being the main hall (which was built first), and the cross bar is a transverse portion added later.
- The structure was probably supposed to have the zenana place as another storey above the main hall, which would explain the bulk and strength of the walls.
- Oblong building 110' X 60' and 35' high.
- Each of the long sided has 6 sunken arches with a doorway below and a window above. The short side has 3 similar arches. The central one is the entrance.
- The interior is a large hall 881/2' X 24 1/2' and 32' high with 5 transverse pointed arches supporting the flat roof.
- The flat roof rested on timber beams whose sockets are still visible, though the timber portions themselves have disappeared.
- It is in the same dimensions as the main hall, but in two storeys.
- It is in a less formal style with some oriel windows of artistic design.
- The ground floor consists of a cruciform gallery, a short arm of which opens into the main hall. There are also subsidiary passages not connecting with the gallery and entered by a separate doorway.
- The first floor overlooks the main hall through an arched opening. It consists of a longitudinal hall of 70' X 40' divided into 3 aisles by 2 rows of pillars and a transverse chamber which may have been a retiring room.