Most commodities are quoted in US$, but are tradable and priced in all currencies. Buying a commodity will protect you from currency risk to an extent. What you want to avoid is any equities that are heavily reliant on the US market and economy, in order to avoid currency risk.
iShares and PowerShares are two of the largest EU based EFT providers. Check out their websites, as they will have information on the individual EFTs they offer, including the base currency.