The wall-paintings were discovered under whitewash in 1936. The most important of them are the arabesque drawings in the Mermaid Passage and on the back staircase and the figures of the Nine Worthies on the second floor. The Small Chapel is decorated with red and white drops for the blood and water of the Passion and there are also traces of medieval work.

The arabesque designs at the south end of the Mermaid Passage, from a drawing by Elsie Matley Moore, City of Birmingham Museums and Art Gallery	The Nine Worthies Passage - Joshua from a drawing by Elsie Matley Moore now held in the City of Birmingham Museums and Art Gallery
The Small Chapel decorated about 1600 with red and white drops for the blood and water of the Passion	The Nine Worthies Passage - David slaying Goliath, from a drawing by Elsie Matley Moore now held in the City of Birmingham Museums and Art Gallery