In the 18th Century, Spa in Belgium became known as the “Café of Europe”. Intellectuals, artists, musicians, writers, politicians, nobility and aristocracy, scientists and philosophers from near and far gathered at the many pump houses to debate the issues of the day. They were required to operate under strict rules of peaceful and polite conduct. Due to this tradition of at the same time informal discussions and intercultural dialogue, but also to the facilities opened to visitors and tourists in the towns: Great Hotels “Palaces”, Congress rooms, Theatres, huge Villas, as well as communication means: well-equipped Post Offices as well as modern telephone’s and telegram’s networks, these cities were obviously – and still are - the places to meet for political diplomatic secret encounters but also international congresses and Summits of Head of States and Governments.