Ambiguity in the Rule of Law was the theme of a colloquium organized by the Hogendorp Centre for European Constitutional Studies in Amsterdam in 1999. The discussion centered around the assumption that enhancing the Rule of Law at the international plane, e.g. by creating law-making and judicial bodies there, often affects the Rule of Law at the domestic plane. Particularly, within national states it would lead to a shift of authority away from the legislature to the executive. Several speakers from The Netherlands, Belgium, The United Kingdom, France and Germany tackled the theme from different angles, expressing thoughts not only on the dangers, but also on the positive effects of increasing international lawmaking on the Rule of Law.