Over the centuries, Wales has experienced large-scale movements of people.
Wales' population has regularly shifted and changed over the ages
By 1852 a total of 1,800 of the convicts in Australia had been tried in Wales
A significant influence on Wales in terms of numbers of people migrating.
What drove the Irish to settle in Wales, and how did they fare?
Could there have been Welsh people in America as early as the 12th Century?
A new kind of migration was proposed in the 19th century
Explore the celebrated and lesser-known incidents in Welsh history, watch rare clips from BBC Wales' own archive, find out about history events in Wales.
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Tracing your Welsh roots? Pick up some tips in our guides.