The ceiling was executed in accordance with Adam volume 11/170 - dated 1769 - by Joseph Rose, who charged £335 for his work in the room, and with medallions by Biagio Rebecca.

It is important to note that Adam volume11/168 has apsidal ends, and according to Mauchline this may be a hang-over from Adam's earlier intention to use this space as a chapel with apsidal ends (Adam volume 50/88).

Stillman notes that Adam volume 8/144 is similar to the executed design (Adam volume 11/170) with the exception of having fatter ovals compared to the executed elongated aureoles.