This week's Grandmother's Choice block is Union Square. It is used to represent the "processions" women organized, first in England, and a few years later in the USA, to make their needs known. Nowadays, it is common to have marches for social change, but it was a new idea at the time. The women carried signs and wore coordinating colors.
There's a link to this BOW about Women's Suffrage and the right to vote on my side bar.