Robert Field 
Geometric Patterns from Churches and Cathedrals [PDF ebook] 

Patterns from churches and cathedrals that are explored and demonstrated so that they can be used in your own designs. Perfect follow up activities for school and other youth trips to these magnificent places. Robert Field has travelled extensively and has taken his camera and a keen eye with him wherever he has gone. Many people will be both suprised and delighted by the sheer number and variety of interesting patterns that he has discovered. This is one of a series of Geometric Patterns books that will appeal both to those who have a particular interest in the topic covered but also to those who are looking for a rich resource of pattern designs.