Hereford Cathedral is the cathedral church of the Anglican Diocese of Hereford in Hereford, England.
A place of worship has existed on the site of the present building since the 8th century or earlier. The present building was begun in 1079. Substantial parts of the building date from both the Norman and the Gothic periods. The cathedral is a Grade I listed building.
The cathedral has the largest library of chained book in the world, its most famous treasure being the Mappa Mundi, a medieval map of the world created around 1300 by Richard of Holdingham. The map is listed on the UNESCO Memory of the World Register.