Hereford Cathedral, formally the Cathedral of Saint Mary the Virgin and Saint Ethelbert the King in Hereford. The cathedral is a Grade I listed building.

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 has the largest library of chained books in the world, its most famous treasure being the Mappa Mundi, a medieval map of the world created around 1300.