As for technique, I used about 30 digital painting layers. The clouds in the background are a photo that I adjusted the hue to bring out more sepia tones. The drawn elements began in ink with a water wash. Colour and texture were digitally added. The image of the Cathedral is from an image that I took - it also is digitally adjusted to suit this illustration.
This image was featured in and A Place for Creation's 2015 Showoff Calendar (November).