What is the fine-grained topic of the following text: This book explains how the Church grew into a complex organisation of bishops and clergy, monasteries and friaries, parish churches and chapels, and how it was reshaped by the Norman Conquest, the Black Death, and the great changes of the Reformation up to the accession of Queen Elizabeth I. Only return the topic.
The evolution and transformation of the Church organization from its inception through the Reformation period.