London has always been a city of renewal – plagues and fires have decimated its population and scarred its buildings, but every time it has recovered and rebuilt itself bigger and better than before. Little wonder, then, that so many of our ancestors were drawn there, whether from dwindling rural settlements around the country or from countries across the globe.

Of course, for many of them the dream of new opportunities turned into a nightmare of slum life in the insanitary and crime-ridden ‘rookeries’. But the ever-changing city also brought with it employment in trades from cab driving to lamplighting, from being a Thames lighterman (working on barges) to a bookbinder in Clerkenwell.

London’s expansion beyond the boundaries of the City really began in the 17th century. Immediately to the north was Moorfields, which had recently been drained and laid out in walks, but it was frequented by beggars – travellers, who crossed it in order to get into London, tried not to linger. Mile End, then a common on the Great Eastern Road, was known as a rendezvous for troops. The general meeting-place of Londoners in the daytime was the nave of Old St Paul’s Cathedral. Merchants conducted business in the aisles, and used the font as a counter upon which to make their payments; lawyers received clients at their particular pillars; and the unemployed looked for work.

St Paul’s Churchyard was the centre of the book trade and Fleet Street was a centre of public entertainment. During Charles I’s unpopular reign, aristocrats began to inhabit the West End in large numbers. Country landowners and their families lived in London for part of the year simply for the social life – the ‘London season’.

Overcrowding saw plagues throughout the centuries. As James I was about to take the throne in 1603, a plague killed around 30,000 people, and the Great Plague of 1665 killed more than twice that – a fifth of the population. Diarist Samuel Pepys, most famous for describing the Great Fire in the following year, wrote that 6000 people died in one week and there was “little noise heard day or night but tolling of bells”.

Although the fire saw little loss of life, it ultimately changed London from a medieval city to a modern one. Many aristocratic residents never returned to the City itself, preferring to take new houses in the West End, where fashionable new districts such as St James’s were built close to the main royal residence of Whitehall Palace. The rural lane of Piccadilly sprouted courtiers’ mansions such as Burlington House. The separation between the middle class mercantile City of London, and the aristocratic world of the court in Westminster became complete.

The East End also became heavily populated in the decades after the Great Fire. London’s docks began to extend downstream, attracting many working people who worked on the docks themselves and in the processing and distributive trades. These people lived in Whitechapel, Wapping, Stepney and Limehouse, generally in slum conditions. Meanwhile the Revocation of the Edict of Nantes in 1685 led to a large migration of Huguenots to London, typically working as silk weavers in Spitalfields.

London began to become the hub of the future empire as the 18th century began. The Bank of England was founded, and the British East India Company was expanding its influence. Lloyd’s of London also began to operate. In 1700 London handled 80% of England’s imports and 69% of its exports. This role as a trading post meant that London never relied on industry in the same way as the great cities of the North and Midlands. As people flocked to London to trade and seek employment, crime grew in proportion. The Bow Street Runners were established in 1750 as a professional police force. Penalties for crime were harsh, with the death penalty being applied for fairly minor crimes. Public hangings were common in London, and were popular public events.

In 1780 London was rocked by the Gordon Riots, an uprising by Protestants against Roman Catholic emancipation led by Lord George Gordon. Severe damage was caused to Catholic churches and homes, and 285 rioters were killed.

A more peaceful phenomenon of 18th century London was the coffee house, which became a popular place to debate ideas. Growing literacy and the development of the printing press meant that news became widely available. Fleet Street became the centre of the embryonic British press.

During the 19th century, London was transformed into the world’s largest city and capital of the British Empire. Its population expanded from 1 million in 1800 to 6.7 million a century later. While the city grew wealthy as Britain’s holdings expanded, 19th century London was also a city of poverty, where millions lived in overcrowded and unsanitary slums, as immortalised by Dickens.

Famous ‘rookeries’ include the St Giles area of central London, which existed from the 17th century and into Victorian times. It was demolished in the late 19th century along with others in the East End as part of slum clearance and urban redevelopment projects.

London’s next major transformation came with the railways, above and then below ground. These allowed the development of suburbs in neighbouring counties from which middle-class and wealthy people could commute to the centre. The growth of greater London again exacerbated the class divide, with the poor left to inhabit the inner city areas.

As the capital of a massive empire, London saw ever more waves of immigrants from the colonies and poorer parts of Europe. A large Irish population settled in the city during the Victorian period, at one point making up about 20% of London’s population. London also became home to a sizeable Jewish community, and small communities of Chinese and South Asians settled in the city. To this day London retains its rich and diverse character, making London ancestry exciting to explore.

Exclusive census analysis from the data at TheGenealogist.co.uk reveals that common 19th century surnames in London include Davis. Green, King, Baker, Harris and Turner; in 1841, Wood and Cooper and Turner were also common, as were Clark and Martin in 1911.

Find London heritage and research resources at www.heritagehunter.co.uk.