St John Maddermarket black plaque

This black commemorative plaque records: St John Maddermarket Maddermarket is known as a street name from the 13th century. Madder, the root of which produced a red dye, was sold at the north end of the churchyard

St John Maddermarket is a medieval church in Norwich, England, named after the street where madder was once sold; it has been a significant religious and cultural landmark since the 13th century.