Salisbury Cathedral is an Anglican cathedral in Salisbury, England, considered one of the leading examples of Early English architecture. The main body was completed in only 38 years. The cathedral has the tallest church spire in the United Kingdom (123m/404 ft). Visitors can take the "Tower Tour" where the interior of the hollow spire, with its ancient wood scaffolding, can be viewed. The Cathedral contains the world's oldest working clock (from AD 1386) and has one of the four surviving original copies of the Magna Carta (all four original copies are in England).nt Mary.