London is the capital of the British Empire and the primary base of operations for numerous residents of England, most notably Queen Victoria.
London is the capital city of England and the United Kingdom and the largest metropolitan area in the country. Located near the
River Thames, it is a global city that prominently thrives in arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, and tourism and transport.
May through August, when the weather is at its best, is known as the "Season," and aristocrats leave their manors to their London townhouses in order to attend social events.
Buckingham Palace is the residence and administrative headquarters of the British monarchy since 1837. Its first and current residing monarch is Queen Victoria.
Crystal Palace is a building in Hyde Park. It was originally built for the Great Exhibition of 1851.
In late 1888, the "The Exhibition of Indian Culture and Its Prosperity in the British Empire" was held there. The exhibition showcased Great Britain's achievements and industry in India and included a curry contest
Queen Victoria herself attended.
Daunt Book Store is a bookshop.
Donson Opticians is an optician's office.
The East End is a dark area in London, plagued by poverty and crime. It is the designated place where people involved with the multinational underworld gather.
The Ferro headquarters is the primary base of operations of the Italian Ferro Company in England.
It is located in
Buck's Row, Whitechapel.
The funeral parlor is a business owned by Undertaker. It provides burial and funeral services for the deceased and their families.
Funtom Corporation is a company founded and owned by Ciel Phantomhive, which sells, among other things, toys, sweets, and cosmetics.
The company's headquarters can be found in London.
Its address is 101  Brompton, London.
Globe-Trotter is a shop in Mayfair which sells luxury luggage, suitcases, and accessories. 
Karnstein Hospital is a medical facility that specialises in illegal human experimentation.
Lock & Co. Hatters is the world's oldest hat shop, founded in 1676 by Robert Davis, and located at 6 St James's Street, London. It holds a Royal warrant. 
Lau operates various opium dens in London. One of them is accessible through the waterway beneath the city.
The Royal London Hospital is a medical facility that provides district general hospital services for the city of London.
Royal London Hospital
Smiths' Olde Sweet Shoppe is a confectionery store.
Weston College, Britain's finest all-boys public school, is located in London, near River Thames.
As of August 1888, the population of London is 4.5 million—excluding the influx of people during the Season.
Out of Universe
The real Daunt Book Store was originally called "Francis Edwards" and opened in 1912. The bookstore was renamed "Daunt Books" when James Daunt bought it in 1990.
 The real Globe-Trotter Company was founded in 1897 by David Nelken in  Saxony, Germany. It only moved to the United Kingdom in 1932.
 Smiths' Olde Sweet Shoppe may have been modelled after Mr. Simm's Olde Sweet Shoppe, a store chain which sells confectionery in Victorian-style stores since 2004.
Kuroshitsuji manga; Chapter 6, page 4
Wikipedia:Crystal Palace, London
Kuroshitsuji manga; Chapter 85, page 16
Kuroshitsuji manga; Chapter 85, page 13
Kuroshitsuji manga; Chapter 15, page 10
Kuroshitsuji manga; Chapter 3, page 29
Kuroshitsuji manga; Chapter 146, page 2
Kuroshitsuji manga; Chapter 85, page 40 ↑
Kuroshitsuji manga; Chapter 85, page 15
Kuroshitsuji manga; Chapter 51, page 13
Wikipedia:James Lock & Co.
Kuroshitsuji manga; Chapter 85, page 14
Kuroshitsuji manga; Chapter 6, page 5
Kuroshitsuji manga; Chapter 23, pages 38-39
Wikipedia:Royal London Hospital
Wikipedia:London sewerage system
Kuroshitsuji manga; Chapter 85, page 18
Kuroshitsuji manga; Chapter 118, page 30
Kuroshitsuji manga; Chapter 124, pages 4-6
Kuroshitsuji manga; Chapter 67, page 3 ↑
Kuroshitsuji anime, Episode 11
Kuroshitsuji II anime, Episode 27
Kuroshitsuji manga; Chapter 8, page 16
Wikipedia:Mr. Simm's Olde Sweet Shoppe