Dublin - Ireland

Dublin the capital of the Republic of Ireland an city with an long history and the current Irish name of the city is Baile Átha Cliath. That means "town of the hurdled ford" but Dublin starts as small Celtic settlement close to to Dublin Castle, the named it Dubhlinn what means "black pool" and in 841 the Vikings came and took over and named the place Dyflin. The Irish tried over the years to kick the Vikings of the Emerald Isle, what eventually succeed for an short time. Next the English came in 1171 took over the place and slowly the entire island and that succeed in the 16th century till after some action most of Ireland get independent in 1922. Dublin has to something of an cultural divider and that's is the river Liffey that split the city. Traditionally the Northside is where the working class to middle class live and work. The Southside is where the middle class to upper class live and work. The postcode system starts with Dublin 1 to Dublin 24, the odd numbers at the north and the evens can be found in the south. Greater Dublin area has an population of around 1,9 million and one thing for sure this city don't bore you at all. So let's take an look at the flag.

The flag has an green background and an blue canton in the upper left. Both colors are considered Irish, the Irish coat of arms and the Standard of the President of Ireland use an blue background with an golden harp. For an long time an green flag with the harp was use as the unofficial Irish flag in the 17th and 18th century. The flag of the Irish province is also almost the same as the unofficial flag but the green is sightlier darker. In the end the golden harp represented Ireland and Leinster. The blue canton contains three burning castles and its taken from the coat of arms of Dublin. There are three theories about the meaning. 

1: The castles are watch towers outside the city walls.

2: The castle is Dublin Castle and is repeated three times because of the mystical significance of the number three.

3: The castles are not castles at all, but represent 3 gates into the ancient Viking city of Dyflin.

But it's also symbolize the zeal of the people of Dublin to defend the city. So we got an merger of an unofficial national flag, official province flag with city arms which feel's kind of cheap. Those burning castle is enough.