I fully endorse Anne's recommendation of Simon Knott's website for Norfolk (and Suffolk) churches. He is a very erudite narrator with a deep understanding and appreciation of all aspects of the 'anatomy' of churches through the ages, coupled with considerable knowledge of the practical effects of the schisms and changes in liturgy in different eras. And he shares a good helping of wit (plus a deep dislike of locked churches with no available keyholders). But best of all, he provides a plethora of images, viewable in high-quality on linked Flikr pages, showing not just the external architecture or a general view from the back of the nave but a lot of key details - painted/carved screens, memorial stones, stained-glass windows, fonts, etc. Particularly valuable if you want a 'family-history' sense of place - e.g. to see the font around which the family would have gathered for the children's baptisms (yes - I know the font is sometimes moved but if it is an old one it is very likely that it was the one used in that church when your local predecessors were baptized).