Short answers, pulled from the story.
Glevum emerged around the year 48 as a Roman fort at a critical crossing of the River Severn. The initial wooden structures gave way to a massive legionary fortress within two decades, centered on what is now Gloucester Cross.
A nine-year-old Henry III was crowned King of England within the Chapter House of Gloucester Cathedral in the year 1216. He used a gilded iron ring to symbolize his sovereignty during a time of national crisis.
The Jewish community in Gloucester was expelled in January 1275 by Eleanor of Provence following false accusations of child murder involving Harold of Gloucester. They were ordered to move to Bristol but eventually relocated to Hereford.
The Gloucestershire Aircraft Company changed its name to the Gloster Aircraft Company in 1926 because international customers found the original name too difficult to spell. This shift marked the city's entry into the aerospace industry.
The severe flood in July 2007 left hundreds of homes flooded and about 40,000 people without power for 24 hours. The entire city and surrounding areas were without piped water for 17 days.
The cloisters of Gloucester Cathedral were used for corridor scenes in Harry Potter and the Philosopher's Stone, Harry Potter and the Chamber of Secrets, and Harry Potter and the Half Blood Prince. The crypt was also used for a scene in the Sherlock Christmas special.