History of Strasbourg remained neutral during the Thirty Years' War (1618-1648), and retained its status as a Free Imperial City. However, the city was later annexed by Louis XIV of France to extend the borders of his kingdom. Louis' advisors believed that, as long as Strasbourg remained independent, it would endanger the King's newly annexed territories in Alsace, and, that to defend these large rural lands effectively, a garrison had to be placed in towns such as Strasbourg. Indeed, the bridge over the Rhine at Strasbourg had been used repeatedly by Imperial (Holy Roman Empire) forces, and three times during the Franco-Dutch War
European institutions in Strasbourg been based in Strasbourg since 1920 (headquarters located in the Palais du Rhin). Its function is to encourage European prosperity by guaranteeing a high level of security for navigation of the Rhine and environs. However the bulk of the European presence in Strasbourg comes from the post-Second World War establishment of institutions. The move towards European integration pushed for the creation of new bodies. The first of these to be established was the International Commission on Civil Status, founded in 1948 and predating the Council of Europe by a few months. The progressive establishment of a peaceful, unified and prosperous