Bridgerton is a completely fictional show but it uses regencyera London as a setting. I have watched it and found it quite fun, but decided to delve deeper to uncover what elements were imagined or not. Surprisingly, or perhaps unsurprisingly, real life was even more dramatic than the show.

Sources
"George IV" by E. A. Smith
"Inside the World of Bridgerton" by C. Curzon
"Prince of Pleasure: The Prince of Wales and the Making of the Regency" by S. David
"The Time Traveler's Guide to Regency Britain" by Ian Mortimer

Photo/Art Credits (in order of appearance)
All depictions of Bridgerton are the intellectual property of Netflix, Inc or associated rights holders
"Ranger's House" by Ricardalovesmonuments
"George III in Coronation Robes" by Allan Ramsay
"George III and Queen Charlotte with their thirteen children" by Thomas Stothard
"St. James Palace, Pall Mall" by Thomas Shepherd
"King George III" by William Beechey
"Princess Amelia" by William Beechey
"George IV" by Thomas Lawrence
"Caroline of Brunswick, Queen of the United Kingdom and Hanover" by James Lonsdale
"Maria Anne Fitzherbert" by Joshua Reynolds
"Carlton House Circular Room" by Charles Wild
"Windsor Castle" by Paul Sandby
"George IV (Coronation)" by Thomas Lawrence
"North Front of Carlton House" by Richard Reeve
"Carlton House Conservatory" by Charles Wild
"Carlton House Main Staircase" by Charles Wild
"Printed Banyan" by Unknown
"Princess Charlotte" by Thomas Lawrence
"Queen Charlotte" by Thomas Gainsborough
"Jane Austen" by Cassandra Austen
"Queen Charlotte" by Benjamin West
Assorted Outfits (Victoria and Albert Museum)
"Lady Emily Lamb" by Thomas Lawrence
"John Fawcett" by Thomas Lawrence
"John Motley" by Thomas Philips
"Wilhelmina Bowlby" by Thomas Lawrence
"Sir Arthur Wellesley, 1st Duke of Wellington" by Thomas Lawrence
"Peter Leopold Nassau Cowper" by John Hoppner
"Julia, Lady Peel" by Thomas Lawrence
"Sir Joseph Banks" by Thomas Philips
"Warren Hastings" by Thomas Lawrence
"Miss Marthe Carre" by Thomas Lawrence
"Mirza Hassan Khan" by Thomas Lawrence
"Mr and Mrs William Lindow" by George Romney
"Elizabeth Taylor" by George Romney
"Amelia Stewart" by Thomas Lawrence
"Sarah Sophia Child Villiers, Countess of Jersey" by Alfred Edward Chalon
"David Lyon" by Thomas Lawrence
"Elizabeth Ramus" by George Romney
"Sally Siddons" by Thomas Lawrence
"The British Institution" by Thomas Rowlandson
Assorted Fashion Prints by way of thegraphicsfairy
Assorted Fashion Prints by Rudolph Ackermann
"Drury Lane Theatre" by Thomas Rowlandson
"Quae Genus Gives a Grand Party" by Thomas Rowlandson
"Quae Genus Committed, with a Riotous Dancing Party, to the WatchHouse" by Thomas Rowlandson
"Almack's Assembly Rooms" by George Cruikshank
"Willis Rooms, King Street, London" by Thomas Shepherd
"Clementina Sarah Drummond, Lady Willoughby de Eresby" by Thomas Lawrence
"Maria Theresia of Thurn und Taxis Princess Esterhazy" by Ernst Lafite
"Dorothea von Lieven" by Unknown
"Miss Mary Tadman" by John Smart
"3rd Viscount Palmerston" by Carl Wildt
"Execution of Louis XVI" by Georg Heinrich Sieveking
"The sorrows of Boney, or meditations in the island of Elba" by John Wallis
"Royalty in a rage or family quarrels" by Robert Cruikshank
"Queen Victoria of England" by Alexander Melville
"Applicants for Admission to a Casual Ward" by Luke Fildes
"Amritsar Massacre" by Unknown

Further Assets from Epidemic Sound, Storyblocks, Envato Elements and Provideofactory