The article is devoted to the European monetary system instituted in Dec. 1978. It became a result of the long lasting search for stabilizing currency relations between member states of the European Community. Therefore, also the said search is discussed in consideration of the Treaty of Rome provisions of 1957. Particular emphasis wa slaid on theses of the Werner report on the economic-monetary union and of the Tindemans report on the European union. Much attention was focused on the so-called „currency serpent" which was mentioned in the both reports as a prerequisite to achieve the monetary stability. The initiative of Valéry Giscard d'Estaing and of Helmut Schmidt to constitute the European monetary system was indicated. The sy...