Prior to 1700s, the only building of consequence at the corner of Main and Queen streets, the recognized centre of Brampton, was William Buffy's tavern. In fact, at the time, the area was referred to as "Buffy's Corners". All real business in Chinguacousy Township took place 1 mile distant at Martin Salisbury's tavern. By 1834, John Elliott laid out the area in lots for sale, and applied the name "Brampton" to the area, which was soon adopted by others.
In 1853, a small agricultural fair was set up by the then-new County Agricultural Society of the County of Peel, and was held at the corner of Main and Queen streets. Grains, produce, roots, and dairy products were up for sale, a precursor of today's Brampton Farmers' Market. Horses and cattle, along with other lesser livestock was sold at market. This agricultural fair eventually became the modern Brampton Fall Fair. In that same year Brampton was incorporated as a village.
A federal grant allowed the village to create its first public library in 1887, which included 360 volumes from the pre-existing Mechanic's Institute (est 1858). In 1907, the library successfully received a grant from steel magnate Andrew Carnegie to build a new multi-person building, featuring what is now the Brampton Library. 
A group of regional farmers in Brampton had trouble getting insurance from city-based companies. After several meetings in Clairville Hall, it was decided that they should found the County of Peel Farmers Mutual Fire Insurance Company. In 1955, the company moved to its third and current location, 103 Queen Street West, and renamed itself Peel Mutual Insurance Company. It reigns as the longest running company in modern Brampton. Harmsworth Decorating Centre was established in 1890, as Harmsworth and Son, operated out of the family's house on Queen Street West. The store purchased its current location on September 1, 1904, after a fire destroyed their original store. Purchased for $1400, the 24 Main Street South location is the longest operating retail business in what is now Brampton. 
Created as an innovative "new town", Bramalea was developed as a separate community, approximately 40 kilometres northwest of Toronto.
Located in the former Chinguacousy Township, it was Canada's first satellite community developed by one of the country's largest real estate developers, Bramalea Limited, formerly known as Brampton Leasing. The name "Bramalea" was created by the farmer William Sheard, who integrated the BRAM from Brampton, MAL from Malton (a neighbouring region), and the LEA, an old British word meaning meadow or grassland. He sold the land to Brampton Leasing developers and built one of Bramalea's first houses on Dixie Road across from the former headquarters of Nortel. The community had an extensive Master Plan, which included provisions for a parkland trail system and a "downtown", which would include essential services and a shopping centre. The downtown area's centrepiece was the Civic Centre, which included the city hall and library. Directly across Team Canada Drive from the Civic Centre, Bramalea Limited built a shopping centre named Bramalea City Centre. The two centrepieces were connected by a long underground tunnel, which has long since been closed due to safety issues. Other features included a police station, fire hall, bus terminal, and a collection of seniors' retirement homes. 
Each phase of the new city was built with progressing first letters of street names. Development started with the "A" section, with street names like Argyle, Avondale, and Aloma. Developer then created a "B" section, "C" section, and so forth. Children on the boundaries of these divisions would regularly compete in street hockey games, pitting, for example, the "D" section versus the "E" section.
The community was also initially developed with a large number of recreational facilities, including tennis courts, playgrounds, hockey/lacrosse rinks and swimming pools. An extensive parkland trail and sidewalk system that connects the entire city, amplifying what Brampton already had in a smaller scale.
In 1974, the Ontario government decided to update Peel County's structure. Along with amalgamating a series of villages into the City of Mississauga, the new City of Brampton was created out of the greater portion of the Townships of Chinguacousy and Toronto Gore, including Bramalea and the other communities in those townships. The province converted Peel County into the Regional Municipality of Peel. Brampton retained its role as the administrative centre of Peel Region, which it already had as county seat. The regional council chamber, the Peel Regional Police force, the public health department, and the region's only major museum, the Peel Heritage Complex, are all located in Brampton. 
This move was not met with open arms. Bramptonians feared urban sprawl would dissolve their town's personality, and Bramalea residents took pride in the built from scratch and organized structure that came with a new city. Many residents of the former community of Bramalea do not classify themselves as Brampton residents.
In 1972, Bramalea created its civic centre. Two years after it was built, when Brampton and Bramalea merged, the new city's council chambers and other facilities were created in the building, moving from the town of Brampton's modest downtown locale. The library systems of Brampton and Bramalea became one, creating a system of four locations. 
The future of Peel Region as encompassing all of Brampton, Mississauga, and Caledon, has been called into question by some. Mississauga council, led by Mayor Hazel McCallion, voted in favour of becoming a single tier municipality and asked the provincial government to be separated from Peel Region, arguing that the city has outgrown the need for a regional layer of government and that Mississauga is now being held back by supporting Brampton and Caledon with its municipal taxes.
In the 1980s, the Capitol Theatre, then owned by Odeon, closed its doors. The City bought the facility in 1981, under the spearhead of then-councillor Diane Sutter, turning the former movie house and vaudevillian stage into a theatre for the musical and performing arts. It was renamed the Heritage Theatre. In 1983, Toronto consultants Woods Gordon reported to the City that, rather than continue "pouring money" into the Heritage, a new 750-seat facility should be built. The 2005/06 season was designated as the theatre's "grand finale" season, and the new Rose Theatre opened in September 2006. 
Carabram was founded in 1984, after volunteers from different ethnic communities wanted to organize a festival celebrating diversity and cross-cultural friendship. With a name based on Toronto like-event, Caravan Festival of Cultures, Carabram's first event included Italian, Scottish, Ukrainian, and West Indian pavilions. By 2003, forty-five-thousand visitors visited 18 pavilions. Canada itself had an anchor pavilion in the late-1980s and early-1990s, and this past year for Carabram's 25th Anniversary, it was included once more.
With a growing multicultural population, the Peel Board of Education introduced evening English as a Second Language (ESL) classes at high schools. Originally taught by volunteers, the classes eventually became daytime courses taught by paid instructors. In the 1980s, the public and Catholic board expanded its languages programs, offering night classes in 23 languages. These were introduced by the urging of parents who wanted their children to learn their ancestral heritage and language. Brampton has a very large South Asian population and it is expected to grow at a high rate.
Spearheaded by then Mayor Ken Whillans, the early 1990s brought a new city hall to Brampton's downtown. Ken never got to see the opening of the new City hall because of his untimely death in August of that same year. The move of City hall to downtown would spark a renewed interest by future politicians and businesses alike to revitalize the downtown core. The facility was designed by local architects and constructed by Inzola Construction.
The Brampton Fair Grounds were sold in 1992 to the City of Brampton, leading the Agricultural Society to relocate to Heart Lake Road and Old School Road (outside the boundaries of the city) in 1997. 
The Health Services Restructuring Commission (HSRC) decided in 1997 that Georgetown and District Memorial Hospital, Etobicoke General Hospital and Peel Memorial Hospital amalgamate into the William Osler Health Centre, becoming what now is the province's 6th largest hospital corporation.
Brampton's 2003 Sesquicentennial celebrations were a booster to community spirit, restarting the tradition of a summer parade (with 100 floats), and creating other initiatives. To commemorate the town's history, the city under Mayor Fennell reintroduced floral projects to the community, including more plantings around town, the restart of the city Parade in 2005, and participation for the last few years in the Canada Communities in Bloom project.
For my Canadian friend Nick Sym :) God_bless you!
- Bizzy Thomas