As in every other branch of learning, the study of the early history
of Christianity has undergone massive changes during the last
century. This has been due not only to the vast accumulation of
knowledge through new discoveries, but to new approaches to the subject,
together with the rise of archaeology as a principal factor in providing
fresh information. The study of the early Church has as a result moved
steadily from dogma to history, from attempts to interpret divine
revelation through the development of doctrinal orthodoxy down the
ages, to research into the historical development of an earthly institution
of great complexity and of great significance in the history of mankind
over the past two thousand years.