Gloucester Cathedral, formally known as the Cathedral Church of St Peter and the Holy and Indivisible Trinity, is a Church of England cathedral located in the city of Gloucester in southwest England. The cathedral was founded in 678 and underwent several renovations and expansions over the centuries. It is one of the finest examples of Gothic architecture in England.

The cathedral is renowned for its stunning stained-glass windows, which date from the 14th century to the 20th century, and its fan-vaulted cloisters, which were used as a location in the Harry Potter movies. The cathedral's Great East Window, created by Thomas Denny, is the largest stained-glass window in Britain.

The cathedral also has a rich history. It was the site of the coronation of Henry III in 1216, and it played a role in the English Civil War when it was used as a prison for captured Royalist soldiers. The cathedral is also the final resting place of King Edward II, who was buried there in 1327.

Today, Gloucester Cathedral continues to serve as an important place of worship and a popular tourist attraction. It hosts regular services, concerts, and events throughout the year and welcomes visitors from all over the world who come to admire its beautiful architecture and rich history.