Belfast
Belfast, Ireland is the original home of the Evans family, notably Petunia (b.1841) and Lily Evans (1843-1871). After Lily went off to Hogwarts in 1856, Petunia remained in Belfast and married Vernon Dursley in 1862. Though Petunia's dowry was enough to support the couple in their early marriage, diminishing work opportunities and rising food costs led the small family into poverty after the birth of their son, Dudley, in 1866. By 1867, Vernon's sister, Marge, and her husband were also struggling, and he died in 1868 just after the birth of their daughter. In early 1869, Marge's daughter was killed by cholera, forcing her to return to her brother in increasing poverty just before Petunia gave birth to their second child, Rose.
Though she was loathed to admit it, Petunia and her family were saved when they took in her orphaned nephew due to that allowance from Remus J. Lupin of £2,000 per year. With small other magical aids blackmailed from Lupin over the years, the family achieved a wealthy lifestyle by 1880, though young Harry did not enjoy the benefit of any of these increases or adjustments.
History
The cite of Belfast has been occupied since the Bronze Age. John de Courcy built a castle in the 12th century in the city centre. Belfast became a substantial settlement in the 17th century after being established as an English town by Sir Arthur Chichester.
The following is from the Wikipedia page on "History of Belfast":
During the Great Famine, a potato blight that originated in America spread to Europe decimated crops in Ireland. A Belfast newspaper predicted the devastating effect the blight would have on the common people of Ireland, particularly in rural areas. The potato crop in 1845 largely failed all-over Ireland with the exception of the west coast and parts of Ulster. One-third of the crop was inedible and fears that those spuds in storage were contaminated were soon realized. In October 1846, a Belfast journal The Vindicator made an appeal on behalf of the starving, writing that their universal cry was "give us food or we perish". The publication went on to scold the United Kingdom for not meeting the basic needs of its people. By 1847, the British government were feeding 3 million famine victims a day, though many were still succumbing to disease brought on by starvation. Many of the poor moved eastward from rural areas into Belfast and Dublin, bringing with them famine-related diseases. Dr. Andrew Malcolm, who was working in Belfast at the time, wrote of the influx of the starving into the town, their horrific appearance and the "plague breath" they carried with them. The Belfast Newsletter reported in July 1847 that the town's hospitals were overflowing and that some of the emaciated were stretched out on the streets, dead or dying.
On 10 July 1849, the Belfast Harbour commissioners, members of the council, gentry, merchants and the 13th Regiment officially opened the Victoria Channel aboard the royal steamer Prince of Wales. This new waterway allowed for large vessels to come up the River Lagan regardless of tide level. After a signal was given, a flotilla of sea craft moved up the channel to the adulation of the large crowds that had gathered to watch the event. The spectacle was concluded by a cannon salute and a resounding chorus of "Rule Britannia" by all those present. This new channel fed the growth of Belfast industry enabling new development, despite being completed during the last years of the Great Famine. Queen Victoria and Prince Albert along with the Prince of Wales visited Belfast in August 1849, sailing up Victoria Channel and venturing into the town. They were received jubilantly by the people of Belfast with fanfare and decorations adorning the streets. The Royal Family moved up High Street amidst rapturous cheers and well-wishing. On the same street, a 32-foot high arch had been built with a misspelled rendering of Irish Gaelic greeting "Céad Míle Fáilte" (a thousand welcomes) written on it. In the White Linen Hall, the Queen viewed an exhibition of Belfast's industrial goods. The Royals would make their way to the Lisburn Road and the Malone Turnpike where Victoria inspected the new Queen's College (later, University). After touring Mulholland's Mill, Victoria and her entourage returned to their vessel.
Belfast was recovering from a cholera epidemic at the time of the Royal visit and many credited Victoria and Albert with lifting the spirits of the town during a difficult period. Conditions for the new working class were often squalid, with much of the population packed into overcrowded and unsanitary tenements. The city suffered from repeated cholera outbreaks in the mid-19th century. Though both Catholics and Protestants were often employed, Protestants would experience preferment over their Catholic counterparts. Hardly any of those in management were Catholic and Protestants would often receive promotion and desirable positions. Working class Catholics were the only group on the whole to experience adverse poverty during this period. Though there were Catholics and Protestants at all levels of society, it was often said "there are no Protestants in the slums". Conditions improved somewhat after a wholesale slum clearance programme in the 1900s.
Belfast was becoming one of the greatest places for trade in the western world. In 1852, Belfast was the first port of Ireland, out pacing Dublin in both size, value and tonnage. However, old sectarian tensions would soon come to the fore resulting in an almost annual cycle of summer rioting between Catholics and Protestants. On 12 July 1857, confrontations between crowds of Catholics and Protestants degraded into throwing stones on Albert Street with Catholics beating two Methodist ministers in the Millfield area with sticks. The next night, Protestants from Sandy Row went into Catholic areas, smashed windows and set houses on fire. The unrest turned into ten days of rioting, with many of the police force joining the Protestant side. There were also riots in Derry, Portadown and Lurgan. Firearms were produced with sporadic gunfire happening all over Belfast, the police could do little to mitigate the turmoil. The Riots of 1864 were so intense that reinforcements and two field guns were dispatched from Dublin Castle. A funeral for a victim of police gunfire was turned into a loyalist parade that unexpectedly went up through Donegall Place in the heart of Belfast. Police barely held as a barrier between the Protestants marching through Belfast's main streets and the irate Catholics who were massing at Castle Place. Continuous gunfire resounded throughout the city until a deluge of summer rain dispersed most of the crowd.
The mud that was dredged up to dig the Victoria Channel was made into an artificial island, called Queen's Island, near east Belfast. Robert Hixon, an engineer from Liverpool who managed the arms work on Cromac Street, decided to use his surplus of iron ore to make ships. Hixon hired Edward Harland from Newcastle-on-Tyne to assist in the endeavour. Harland launched his first ship in October 1855, his cutting-edge designs would go on to revolutionize the ship building world. In 1858, Harland would buy-out Hixon with the backing of Gustav Schwab. Schwab's nephew, Gustav Wolff had been working as an assistant to Harland. They formed the partnership of Harland & Wolff in 1861. Business was booming with the advent of American Civil War and the Confederacy purchasing steamers from Harland & Wolff. Gustav Schwab would go on to create the White Star Line in 1869, he ordered all of his ocean vessels from Harland & Wolff, setting the firm on the path to becoming the biggest ship building company in the world. Harland & Wolff would go on to build some of the world's most famous (and infamous) ships including HMHS Britannic, RMS Oceanic, RMS Olympic and, best known of all, the RMS Titanic.