The most-seen Puerto Rican flag is red, white and blue; however, the black-and-white flag was at the vendor stands at the festival on Parcel 5. One vendor told us it is a universal flag of protest.

The one country whose flag doesn’t have red, white or blue among its colors is—drumroll, please—Jamaica. Indeed, this ...

Ed Ram/Getty There is much debate about the exact origin of the Union Jack flag's name. In the 16th century, it was initially called the British flag and in 1625, the word "Union" was introduced.