The following article deals with questions of European Legal Harmonisation and takes an exemplary approach to an initial analysis of the field of freedom of establishment and its effects on European company law. This Europeanised field of law thus represents an inductive observation of the topic of harmonisation but it can also occasionally symbolise, pars pro toto, other harmonised legal areas. Regarding freedom of establishment, it should be shown that European harmonisation has been taking shape for many years and that new requirements are constantly being created for, and through diverse political key players. Here, some key players could be identified, the special role of the European Court of Justice could be emphasised; and topics of such Europeanisation could be briefly pursued. However, it will be shown that the monopoly position of this institution – not political in itself – is remarkable. [---]