The phrase became popular in the 1800s when indoor plumbing and flushing toilets became more common. Early toilets were often placed in small closet-like rooms, which is how the name “water closet” began.
Although Americans usually say “bathroom” or “restroom,” many countries in Europe and beyond still use “WC” on public signs. It is short, simple, and easy for travelers to recognize across different languages.
Today, WC signs can be found in airports, train stations, cafés, museums, and public buildings around the world. What looks like two ordinary letters is actually a small piece of history that has guided travelers for generations.
