Fill in the Blanks Union JackOnline version union jack by Celine Cerdio 1 unity Ireland flag flags England Union Andrew history Flag nation The Union Jack is the national of the United Kingdom . It is a bold and recognizable symbol , made up of three different crosses . The red cross of Saint George represents , the white diagonal cross of Saint symbolizes Scotland , and the red diagonal cross of Saint Patrick stands for . These crosses are overlaid on a blue background called the Union . The design of the Jack has a rich , dating back to the union of England and Scotland in 1606 . Over time , as the UK evolved , so did its flag , culminating in the current design in 1801 . Today , the Union Jack is proudly flown across the UK and can be seen on , clothing , and buildings , representing the and diversity of the .
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