What is the drinking age in France, Germany, Switzerland, and Italy?

I am going on a trip soon and would like to know the actual drinking ages for each of these countries. I need to plan for many people traveling and I have no idea what the legal drinking ages are. Please do not give me an answer unless you are 100% sure of what you are saying. Also if you could please tell me where you got your information so that I can figure out the most helpful source. ... more