The Argentinean flag is one of my favourites.

The flag of Argentina is horizontally striped celeste-white-celeste, often it includes including a highly symbolic central golden sun. Its width-to-length ratio varies: proportions of 1 to 2 and of 9 to 14 are commonly used on land, while the ratio 2 to 3 is used at sea.

I have read lots of information about this flag and it is most likely that the blue cockades worn by patriots 10 May 1810, when the Spanish viceroy in Buenos Aires yielded authority to the Buenos Aires Cabildo, and the uniforms worn by the Argentine militias in 1806 & 1807, when the British attacked Buenos Aires and were repelled, may have been the origin of the celeste-white-celeste horizontally striped flag first hoisted on February 12, 1812, by General Manuel Belgrano.

On July 9, 1816, Argentina, then part of the United Provinces of the Río de la Plata, the remnants of the old Viceroyalty of the Rio del la Plata, proclaimed its independence from Spain after the conference of Tucuman. However, it was not until February 25, 1818, that the golden ' Sun of May' was added to the centre of the flag in reference to the events of 10 May 1810, when the sun supposedly broke through black clouds casting an amazing light on Buenos Aires as the portenos exiled the Spanish Viceroy who had shown unprecedented cowardice in fleeing two British invasions with his garrison.

At first there were struggles between those who wanted a strongly centralised Argentina and those who favoured broad autonomy for individual provinces, many of which had their own flags and ruling classes of their own. This period saw many battles between the Unitarians and Federalists whose opposing colours of red and white gave eventually gave the colour pink to la Casa Rosada. Finally, in 1860 definitive unification firmly established the celeste-white-celeste as the sole flag of Argentina. On August 16, 1985, after the end of Military rule, permission was granted to private citizens to fly the version that is famous throughout the world today, which incorporates the Sun of May in the centre, a right previously restricted to the government and military.