Diamond City

“Diamond City holds answers, but they're locked tight. You ask them what they know, but people's hearts are chained up with fear and suspicion.” — Mama Murphy
Diamond City, commonly referred to as the "Great Green Jewel," is a large fortified settlement in the Commonwealth in 2287.
The settlement was built within Boston's world-renowned baseball stadium that once hosted Boston's resident "swatting sultans". Its distinctive green color visible on the tall, reinforced walls, earning the nickname of the "Green Monster."
With its own police force, public school, robust agriculture and industry, as well as a great deal of economic influence across the region, it is by far the most prosperous settlement in the Commonwealth. Diamond City Radio is a symbol of its prosperity and might.
Background With the years of pre-War baseball long past, Diamond City was founded in its stead. The settlement established itself as a safe haven for settlers of the Commonwealth, thanks to what its residents affectionately referred to as "the Wall." Later decades saw Diamond City grow into the Commonwealth's largest and most prosperous community. It developed a degree of social stratification as wealthier residents came to occupy properties in the settlement's exclusive upper stands. These overlooked the lower field where those with less means took up residence.
Post-War events The stadium and those who live within have experienced several significant events after the war. In 2180, the Commonwealth Minutemen defended the city from an attacking horde of super mutants, causing the militia's rise to prominence. The Broken Mask incident that occurred fifty years later, in 2229, had a far more lasting impact. A visitor named Mr. Carter suddenly opened fire at a centrally located Diamond City bar, killing several citizens. After Diamond City security took him down, an examination of his remains revealed that he was a synth. This single incident planted seeds of fear that eventually blossomed into a full-scale paranoia about the Institute and its abductions. Since the event, the fear has only escalated due to regular and unexplained disappearances that have persisted for over half a century.
The city continued to grow despite these troubles, affecting the Commonwealth in many ways. One of its more dubious contributions is Goodneighbor, a settlement founded by a group of criminals banished from the city in 2240, quickly turning it into a haven for all activities that Diamond City would frown upon. Others were more beneficial. In 2272, a new restaurant named Power Noodles was established, with a Protectron known as Takahashi at the helm. The restaurant rapidly became a staple of Diamond City culture. Piper Wright and her sister, Nat, also immigrated to the city, founding the Publick Occurrences, a newspaper dedicated to changing the city for the better and addressing its many problems. Her activism has galvanized support for fixing the city's problems, such as corruption among the DCS officers, poorly maintained infrastructure, or lack of maintenance on the Wall separating the city from the wasteland.
However, the city's denizens were not immune to the baser instincts of humanity. In 2282, Diamond City fell prey to a surge of anti-ghoul sentiment, fermented by a candidate by the name of McDonough ran for the city's mayor on the Mankind for McDonough platform, which was effectively an anti-ghoul crusade. He won the 2282 election thanks to the votes of the upper stands citizens and issued the anti-ghoul decree of 2282 in his inaugural speech. The resulting pogrom was carried out by people the ghouls once called their neighbors and saw entire families thrown out of the city into the surrounding ruins to perish. The belongings left behind by the ghouls were taken by the remaining humans, enriching the denizens of the field and pacifying them. Five years later, in 2287, McDonough remains in power, posing as the city's defender, while secretly ensuring that Diamond City stays out of The Institute's hair. As an infiltrator, he is very capable in his role - although his cover is starting to fray at the edges. Some residents came to believe McDonough had been replaced by a synth. It is a suspicion fermented by Piper and her sister Nat, as part of their investigative journalism for Publick Occurrences.
Society Diamond City is divided between people living on the former baseball field and those in the upper stands. The former comprise the city's laborers, craftsmen, farmers, and other workers, while the latter are caravan owners, merchants, and other rich people who control the lion's share of the City's wealth. McDonough exploited this divide and favored the city's elite, which may have wanted ghouls gone merely to improve their view.
Diamond City is the only settlement in the Commonwealth that guarantees a free education to all children, regardless of their social or financial status. It also hosts a non-denominational chapel open to all religious adherents, giving them a quiet, safe space to pray and worship. Power is provided by a fusion generator tower in the heart of the city's market, giving its denizens access to cheap electricity. The irony of nuclear power first destroying the world then giving Diamond City its main advantage is not lost on the more scientifically-inclined members of the community. Food is provided to the city from independent farms across the Commonwealth, such as Abernathy farm. However a much larger supplier is the Codman family's holdings, who own both the orchard within the walls, as well as the Codman family farms, which provides brahmin meat to Choice Chops.
Layout The city is split into social classes where the rich and powerful reside in the upper stands, while the common people, both housed and unhoused, live in the field below. The center of the city is the marketplace, which is approached by the main entrance stairs from the south. Surrounding the marketplace are four main streets laid out along the old baselines: First Street on the south side, Second Street on the east side, Third Street on the north side, and Home Street on the west side. The least wealthy residents sleep under shelters in the area north of Third Street, where they tend a small number of crops. At the north side of the city, there is an auditorium area, a larger crop field, and brahmin pen. There is also a small irradiated lake to the east of Second Street, where the city's water is purified and sold.
Food can be harvested from the small and large crop fields, or from the greenhouse building, or bought from vendors. Purified water can only be obtained from vendors. All types of standard crafting station are available for use in the marketplace. A bed may be rented at the Dugout Inn, or by obtaining access to either Home Plate or Kellogg's house.
Buildings Abbot's house All Faiths Chapel Arturo's house Chem-I-Care Choice Chops / Polly's house Codman residence Colonial Taphouse Commonwealth Weaponry Cooke residence Diamond City market Diamond City Radio Diamond City Surplus Doc Crocker's house Doctor Sun's house Dugout Inn Earl Sterling's house Fallon's Basement Greenhouse Hawthorne residence Hidden diner  Home Plate Kathy & John's Super Salon Kellogg's house Latimer residence Mayor's office Mega surgery center Myrna's house Pembroke residence Power Noodles Publick Occurrences Schoolhouse Science! Center Security office Sheng Kawolski's house Swatters Valentine Detective Agency The Wall
Inhabitants Companions Piper Wright Nick Valentine
Residents Abbot Ann Codman Arturo Rodriguez Becky Fallon Cathy Clarence Codman Danny Sullivan Darcy Pembroke Doc Crocker Doctor Duff Doctor Sun Ellie Perkins Eustace Hawthorne Erin Reische Hawthorne Gavin Everitts Geneva Henry Cooke John Kyle¹ Malcom Latimer Mayor McDonough Miss Edna Mister Zwicky Moe Cronin Myrna Nat Wright Nelson Latimer Nina Rodriguez Pastor Clements Paul Pembroke Percy Pete Pembroke Polly Professor Scara Phil Wallace Riley¹ Scarlett Sheffield Sheng Kawolski Solomon Takahashi Travis Miles Vadim Bobrov Wellingham Evelyn Black Nuka-World
Animals Toro 27 House cats 2 Brahmin
Generic 20 Diamond City security officers 18 unnamed residents² 2 Eyebots Police Protectron (inactive)