Roman and medieval ruins in the City of London! As well as the ruins of St Alphage church you’ll also find a fascinating section of the old city wall. It is the only surviving stretch with medieval, brick crenellations. These were added in 1477 by King Edward IV during the Wars of the Roses. The diamond pattern on the bricks is known as ‘diapering’. This probably comes from the ancient Greek ‘diaspros’ meaning ‘across white’ and referred initially just to the geometric pattern. It later became a