Countries that have had their current flag for the longest

Can you name the countries that have had their current flag design for the longest period of time
The answers only include current sovereign states, however the state may not have been sovereign at the date of flag adpotion
Disregards changes that do not alter the basic design of the flag; like the changes in ratio or colour shade, restyling of emblems or inscriptions or the addition or removal of stars
Quiz by GainsWorldwide
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Last updated: September 14, 2014
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First submittedSeptember 14, 2014
Times taken2,173
Average score60.0%
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Year of Flag Adoption
Country
1370
Denmark
1538
Sweden
1572
Netherlands
1606
United Kingdom
1777
United States of America
1817
Chile
1818
Argentina
1821
Norway
1825
Peru
1828
Uruguay
Year of Flag Adoption
Country
1830
France
1831
Belgium
1831
Tunisia
1842
Paraguay
1844
Turkey
1847
Liberia
1848
Romania
1851
Bolivia
1860
Ecuador
1861
Colombia
+2
Level 77
Dec 13, 2014
I don't think the US flag should be here. While technically the format and idea of the flag design hasn't changed, it went through multiple incarnations as states kept joining.
+2
Level 28
Dec 14, 2014
Of course it should be here. Go back and carefully read the quiz instructions, they say to disregard changes that do not alter the basic design of the flag which includes the addition or removal of stars. As you said the format hasn't changed. The only significant change since 1777 is the addition of stars. The reason why the date listed in the quiz is 1777, is because prior to that the flag featured the union jack which is a different flag design.
+1
Level 56
Jan 13, 2015
If it's "design" then French flag was created in 1794. ;)
+1
Level 28
Jan 15, 2015
The Bourbon Restoration ;) Google it. They had a different flag between 1815-1830
+1
Level 28
Feb 27, 2019
Wow, turkey and the Ottoman Empire had the same flag for over 170 years? I never knew that.