London medieval devotional: "a cautionary tale for ambitious politicians"

While excavating by the Thames River, a team of archaeologists from the Museum of London Archaeology (MOLA) recently discovered a rare, metal devotional, dating to the 14th century, depicting "the capture, trial and execution of Thomas, Earl of Lancaster, political rebel turned martyr." (photos)

The 129.6mm by 88.5mm panel is considered "a cautionary tale for ambitious politicians," although its subject was later venerated almost to saintly status. The lead-alloy piece is believed to be of the type sold at pilgrimage sites throughout England. The panel is now on display at the Museum of London.