List of former national capitals

Columns: Old capital city | Country | Today a part of | From | Until | Change , reason
Roskilde | Denmark | Denmark | c. 1020 | 1443 | moved to Copenhagen | Ribe | North Sea Empire | Denmark | 1016 | 1035 | Empire collapsed with the death of Cnut the Great | Copenhagen | Kalmar Union | Denmark | 1443 | 1524 | Copenhagen | Denmark-Norway | Denmark | 1524 | 1814 | Turku | Finland , Grand Duchy of | Finland | 1809 | 1812 | moved to Helsinki | Vaasa | Finland , Republic of | Finland | 1918 | 1918 | Temporary capital during the Civil War | Ferns | Laighin ( Leinster ) ( under Dermot MacMurrough ) | Ireland | 6th century | 12th century | Ireland invaded by Normans

Example questions:
What was the nature of the city that was the former national capital of Norway from 997 to 1217 at its founding ? | What peninsula does the city that was the former national capital of Norway from 1217 to 1299 lie on ? | What temperature scale was invented in the former national city which was the capital of Sweden from 1273 to 1436 ? | What was the name of the former national city which was the capital of Norway from 1905 to 1925 at its founding ? | What is the population of the city that was the former national capital of Ireland from 1642 to 1651 ?

Answers:
trading post | Bergenshalvøyen | Celsius | Ánslo | 26,512