A team of researchers is using Optical Coherence Tomography, a medical imaging technique, to study the Byward Angel, a well-preserved wall mural in the medieval section of the Tower of London. Expert believe the painting dates to the late 14th century. (video)
The medical imaging technique allows art historians to study the structural layers of paint and analyze the materials used in the creation of the mural.
A short video explaining the technique is available to view on the website.