London is Europe's largest financial center and one of the world's top three alongside New York and Tokyo. The UK economy relies heavily on services, especially financial services centered in London, which accounts for about 73% of GDP. Manufacturing now makes up only about one-sixth of the economy compared to its previous importance during the Industrial Revolution, which began in the UK and drove its rise as a global economic and imperial power through the 19th century. The UK has transitioned to a primarily service-based economy led by sectors like banking, insurance and tourism, with London as a major global hub of business and commerce.