10. The rainbow flag became a symbol at the 1978 San Francisco Pride Parade.
The original flag, which has cemented its place in LGBT history, was designed by artist Gilbert Baker with 8 colors, each symbolizing something: hot pink (sexuality), red (life), orange (healing), yellow (sunlight), green (nature), turquoise (magic/art), blue (serenity/harmony) and violet (spirit). Eventually the hot pink and turquoise stripes were dropped.