Short answers, pulled from the story.
Colchester occupies the site of Camulodunum, the first major city in Roman Britain and its first capital after the Roman conquest in AD 43. The town was mentioned by Pliny the Elder, who died in AD 79, and its Celtic name appears on coins minted by the tribal chieftain Tasciovanus around 20-10 BC. Colchester therefore claims to be Britain's first city.
Boudica's Iceni forces attacked and destroyed Camulodunum in AD 61, burning the colonia to the ground. After the destruction, London replaced Colchester as the capital of the province of Britannia. The city was subsequently rebuilt and its walls, running approximately three thousand yards in circumference, were constructed between around AD 65 and AD 80.
The Roman circus, a chariot-racing track, was discovered in 2004 during archaeological investigations by Colchester Archaeological Trust prior to the redevelopment of Colchester Garrison. It is estimated to have accommodated around eight thousand spectators and is a unique find in Britain. Excavations also confirmed the circus was surrounded by a cemetery from which 516 burials were recovered.
Jane Taylor, who lived in Colchester's Dutch Quarter, wrote the poem published in 1806 under the title "The Star". In 2024 a statue sculpted by Mandy Pratt depicting Taylor and her sister Ann was unveiled in Colchester High Street following a campaign by Sir Bob Russell.
In 1648, during the Second English Civil War, a Royalist army under Lord Goring entered Colchester and was surrounded by a Parliamentary force led by Thomas Fairfax and Henry Ireton. The siege lasted eleven and a half weeks, beginning on the 13th of June. Lord Goring signed the surrender document on the 27th of August inside the Kings Head Inn, after which Charles Lucas and George Lisle were executed in the grounds of Colchester Castle.
Colchester's city status was dated the 5th of September 2022 by Queen Elizabeth II, announced as part of the Platinum Jubilee Civic Honours on the 20th of May 2022. The official ceremony took place on the 23rd of November 2022, and King Charles III visited on the 7th of March 2023 to congratulate the city on receiving the status.