Northumbria is neither a country nor a city. It is a historic region in northern England that encompassed parts of what is now modern-day Northern England and southeastern Scotland.
Rome is both a city and a country. It is the capital city of Italy, which is a country in Europe.
The chief city of a country is typically its capital city.
Ottawa, Ontario is the capital city of Canada.
Whitehorse is a city located in the Yukon territory of Canada. It is not a country, but a city within the larger country of Canada.
Iraq.
Northumbria ended in 954.
Aldfrith of Northumbria died on 704-12-14.
Northumbria Student was created in 2004.
Æthelred I of Northumbria died in 796.
Northumbria Press was created in 2009.
Ecgberht I of Northumbria died in 873.
Æthelfrith of Northumbria died in 616.
Northumbria Police was created in 1974.
Ecgfrith of Northumbria was born in 645.
Northumbria University was created in 1992.
Osberht of Northumbria died in 867.
Oswald of Northumbria was born in 604.