Bangor Cathedral is one of the oldest Christian shrines in the UK. The first Church and monastic settlement at this place dates back to the VI century ad, the Cathedral later began to wear the name of its founder, Welsh St Deiniol. The bishopric of Bangor is also one of the oldest in the UK.

Holy Daniel came from a family of a Christian priest and devoted his life to serving God. Approximately 525 year he founded a monastery at Bangor under the patronage of Mailgun up Cadwallon, the then ruler of the Kingdom of Gwynedd.

It is noteworthy that the Cathedral was built not on a hill or hill, which is typical for Christian churches, but on the contrary, in the lowland, in an inconspicuous spot. Historians believe that monks thus wanted to protect themselves from the raids of the Vikings. Despite such precautions, the monastery was plundered in the year 634, and then in 1073. From the original buildings to the present day nothing has been preserved. In the beginning of the XII century, the Cathedral was restored, largely thanks to the support and financial assistance of the ruler of Gwynedd of Griffid AP Keenan. Grifid AP Keenan buried near the altar of Bangor Cathedral, as well as his sons Cadwaladr and Owain.

In 1402 during the uprising of Oina of Glyndwr's Cathedral was burned and rebuilt only to 1530 years.

The building that exists today is the result of the work of sir George Gilbert Scott, who in 1868 was headed by large-scale works on reconstruction and restoration of the historic Cathedral.

In the Cathedral there is an "Biblical garden", in which grow all the plants mentioned in the Bible.