The article deals with the constitutional development of Czechoslovakia from its creation (28th October 1918) to theadoption of its Constitutional Charter (29th February 1920). It looks for similarities and differences between theconstitutional laws and parliamentary rules of procedure of the Habsburg Monarchy and the new republic. Also, itobserves the discussions in the Constitutional Committee and in the plenary sessions of the National Assembly andcompares the Rules of Procedure of the House of Commons of the Reichsrat of 1875 and Act No. 325/1920, On theRules of Procedure of the House of Commons of the National Assembly. Despite the change of state form there were,especially at the level of parliamentary rules, many similarities which resulted from a common tradition and theexperiences of leading Czech politicians in the Viennese parliament.