Search Amazon for books, videos, music CDs, toys, electronics. Historical evidence is considered most valuable if it is contemporary or close to contemporary. It must also contain an adequate enough description of the structure to ensure that the building in the document and the building being examined are the same. There are obvious limits to this type of evidence. Archaeologycan help to provide information in cases where the documentary evidence is not in itself sufficient proof to establish a link between the documentary source and the site in question.
Archaeology can often provide a date between two defined limits.
The archaeological method is often used on ruined churches which do not provide information that is useful for secondary dating such as positions of altars or the types of windows. Secondary evidence tends not to be as strong as primary evidence because Secondary evidence relies on stylistic comparisons. The Chapel of St. Laurence is a hybrid of distinct earlier styles. The Northumbrian style was three times as long as it was broad, square sanctuary and no porticus. St. Laurence is a combination of both styles, which was becoming increasingly more common.