The Midlands is an area spanning central England that broadly corresponds to the early medieval Kingdom of Mercia. It borders South East England, South West England, North West England, Yorkshire and Humber, East of England and Wales. Its largest city is Birmingham, and it was an important location for the Industrial Revolution of the 18th and 19th centuries. The greater part of the area is now administered as the Government Office Regions of the West Midlands and East Midlands.