Bangor Cathedral - one of the oldest Christian sites in the UK. The first church and monastic settlement at this place dates back to the VI century BC, the cathedral later became to bear the name of its founder, the Welsh saint Deyniola. Bishopric of Bangor is also one of the oldest in the UK.

Holy Deyniol came from a family of Christian priest and devoted his life to serving God. Around 525 he founded the monastery at Bangor under the patronage of Cadwallon ap Maelgwn, then ruler of the kingdom of Gwynedd.

It is noteworthy that the church is not built on a hill or a hill, which is typical of Christian churches, and vice versa, in a valley, in an inconspicuous place. Historians believe that monks would thus guard against Viking raids. Despite these precautions, the monastery was plundered in 634 year, and then in 1073. From the original building to the present day nothing left. At the beginning of the XII century cathedral has been restored, largely with the support and financial assistance to the ruler of Gwynedd, Gruffudd ap Cynan. Gruffydd ap Cynan buried near the altar of the Cathedral of Bangor, as well as his sons and Kadvaladr Owain.

In 1402, during the uprising of Owain Glyndŵr's Cathedral was burned and rebuilt only to the 1530th year.

The building that exists today - is the result of work by Sir George Gilbert Scott, who in 1868 led a large-scale work on reconstruction and restoration of the old cathedral.

On the territory of the cathedral is divided "biblical garden", which grow all the plants mentioned in the Bible.