Ajax is a town in Durham Region in Southern Ontario, Canada, located in the eastern part of the Greater Toronto Area. The town is named for HMS Ajax, a Royal Navy cruiser that served in World War II. It is about twenty-five kilometers (16 miles) east of Toronto on the shores of Lake Ontario and is bordered by the City of Pickering to the west and north, and the Town of Whitby to the east.Before the Second World War, Ajax was a rural part of the township of Pickering. The town was established in 1941 when a Defense Industries Limited (D.I.L.) shell plant was constructed and a town site grew around the plant. By 1945 the plant employed over 9,000 people at peak production. It had its own water and sewage treatment plants and fifty kilometers (31 miles) of railroad and 50 kilometers (31 miles) of roads. The entire D.I.L. plant site was about twelve square kilometers (5 square miles).Pickering is a city located in Southern Ontario, east of Toronto in Durham Region. It was settled by British colonists starting in the 1770s. Many of the smaller rural communities have been preserved and function as provincially significant historic sites and museums.Whitevale, formerly Majorville, is a community located within the City of Pickering. The community was first settled in the 1820s when John Major built a sawmill; there were many Majors living in the area. Around 1855 Truman P. White bought the saw mill, built a gristmill and a cooperage, and in 1866 built a planing factory. In 1867 he built a large four storey brick woolen mill. The community owed so much of its development and business prosperity to T.P. White that in acknowledgement, it adopted Whitevale as its permanent name. In 1855, Donald McPhee opened the first store.In 1890 Whitevale contained a stave and heading factory and a barrel factory both owned and operated by the Spink brothers; three general stores, one owned by James Taylor and Donald McPhee; a wagon and carriage factory, operated by the Pollard brothers; a cheese factory, owned and operated by P.R. Hoover and Company; the merchant and tailoring firm of J. Rose and Son; the shoemaker shops of John Allen and D. Moodey; the butcher shop of Israel Burton and the tinsmith shop of S.B. Wigmore. In addition, Whitevale contained two blacksmiths, two wagon shops, a school house, undertakers, harness shop, grist mill, brush factory, grindstone factory, barber shop, three dressmakers, three gardeners, money order and post offices, hotel, brass band, two churches and four lodges.The Whitevale Heritage Conservation District was established to ensure the preservation and enhancement of the special character of Whitevale. It is dominated by its rural setting and modest vernacular buildings; the hamlet has not changed significantly in character since the late 19th century. The building style in Whitevale is a mixture of typical rural Ontario vernacular architecture combined with Victorian influences and materials in common usage at the time of construction. The overall nineteenth century village character has been retained.