United Kingdom

Cities

How Dense Is London?

With 9.1 million residents, London is the third most populous city in Europe. But those people are not spread evenly across the capital. Some outer suburbs have just 30–50 homes per hectare, while the most intensely residential inner pockets reach 240–435.

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Ethnic mapsMigration maps

Four British Migrations That Shaped America

Massachusetts doesn’t feel like Virginia for a reason. Between 1620 and 1770, four British regions sent settlers with completely different worldviews. East Anglian Puritans built communal New England. North Midlands Quakers created tolerant Pennsylvania. Southern English gentry ran hierarchical Virginia. Scottish-English borderers settled independent Appalachia. The map shows where they came from and where they went. American regions still reflect those origins.

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Cultural cartographyHistorical Maps

Where Roman coins have been found in Europe

Roman currency comprised gold, silver, bronze, orichalcum, and copper coins. From its introduction to the Roman Republic, during the 3rd century B.C., well into Imperial times, Roman currency saw numerous changes in form, denomination, and composition. A persistent trait was the inflationary debasement and replacement of coins over the times. Well-known examples of this followed the reformations of Diocletian.

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