Wells Cathedral is an Anglican cathedral in Wells, Somerset, England, dedicated to St Andrew the Apostle. It is the seat of the Bishop of Bath and Wells, whose cathedra it holds as mother church of the Diocese of Bath and Wells. Built as a Roman Catholic cathedral from around 1175 to replace an earlier church on the site since 705, it became an Anglican cathedral when King Henry VIII split from Rome. It is moderately sized for an English cathedral. Its broad west front and large central tower are dominant features. It has been called "unquestionably one of the most beautiful"and "most poetic" of English cathedrals.

Its Gothic architecture is mostly inspired from Early English style of the late 12th to early 13th centuries, lacking the Romanesque work that survives in many other cathedrals. Building began about 1175 at the east end with the choir. Historian John Harvey sees it as Europe's first truly Gothic structure, breaking the last constraints of Romanesque.The stonework of its pointed arcades and fluted piers bears pronounced mouldings and carved capitals in a foliate, "stiff-leaf" style. Its Early English front with 300 sculpted figures is seen as a "supreme triumph of the combined plastic arts in England". The east end retains much ancient stained glass Unlike many cathedrals of monastic foundation, Wells has many surviving secular buildings linked to its chapter of secular canons, including the Bishop's Palace and the 15th-century residential Vicars' Close. It is a Grade I listed building.

The earliest remains of a building on the site are of a late-Roman mausoleum, identified during excavations in 1980. An abbey church was built in Wells in 705 by Aldhelm, first bishop of the newly established Diocese of Sherborne during the reign of King Ine of Wessex. It was dedicated to St Andrew and stood at the site of the cathedral's cloisters, where some excavated remains can be seen. The font in the cathedral's south transept is from this church and is the oldest part of the present building.In 766 Cynewulf, King of Wessex, signed a charter endowing the church with eleven hides of land. In 909 the seat of the diocese was moved from Sherborne to Wells.

The first bishop of Wells was Athelm (909), who crowned King Æthelstan. Athelm and his nephew Dunstan both became Archbishops of Canterbury. During this period a choir of boys was established to sing the liturgy. Wells Cathedral School, which was established to educate these choirboys, dates its foundation to this point. There is, however, some controversy over this. Following the Norman Conquest, John de Villula moved the seat of the bishop from Wells to Bath in 1090. The church at Wells, no longer a cathedral, had a college of secular clergy.

MINISTRY: Since the 13th century, Wells Cathedral has been the seat of the Bishop of Bath and Wells. Its governing body, the chapter, is made up of five clerical canons (the dean, the precentor, the canon chancellor, the canon treasurer, and the archdeacon of Wells) and four lay members: the administrator (chief executive), Keeper of the Fabric, Overseer of the Estate and the chairman of the cathedral shop and catering boards. The current bishop of Bath and Wells is Peter Hancock, who was installed in a service in the cathedral on 7 June 2014. John Davies has been Dean of Wells since 2016.

Employed staff include the organist and master of choristers, head Verger archivist, librarian and the staff of the shop, café and restaurant. The chapter is advised by specialists such as architects, archaeologists and financial analysts.

More than a thousand services are held every year. There are daily services of Matins, Holy Communion and Choral Evensong, as well as major celebrations of Christian festivals such as Christmas, Easter, Pentecost and saints' days. The cathedral is also used for the baptisms, weddings and funerals of those with close connections to it. In July 2009 the cathedral undertook the funeral of Harry Patch, the last British Army veteran of World War I, who died at the age of 111.

Three Sunday services are led by the resident choir in school terms and choral services are sung on weekdays. The cathedral hosts visiting choirs and does outreach work with local schools as part of its Chorister Outreach Project. It is also a venue for musical events such as an annual concert by the Somerset Chamber Choir.

Each year about 150,000 people attend services and another 300,000 visit as tourists. Entry is free, but visitors are encouraged to make a donation towards the annual running costs of around £1.5 million in 2015.