Image credit: Thomas Jefferson Foundation/Robert C. Lautman Copyright © Thomas Jefferson Foundation, Inc.
Is this the bedroom of the portuguese Abbot Correia da Serra? He was a great friend of Thomas Jefferson.
The Abbé José Correia da Serra did indeed stay in this room during his visits to Monticello. Here's a page about the room from our Thomas Jefferson Encyclopedia. The room has been painted yellow since this photo was taken (much like paint in the Dining Room).