The refraction of light and colour in glass is perhaps art in its most luminous form.
St David's Cathedral
Last week I spent some time in the city of St David's in west Wales and needless to say visited the famous cathedral while there. Unlike most cathedrals, St Davids is built in a hollow and hidden from view, this was to protect it from the invading Vikings.
Details from one of the lovely rose windows in the cathedral. The stained glass was made in the 1950s at the William Morris Workshop.