The session opening on this day in 1848 in the Frankfurt am Main Pauluskirche as a result of the March Revolutions precipitated by the upheavals for Prussia and the German Empire caused by the Napoleonic Wars and the dissolution of the Holy Roman Empire, the Frankfurter Parliament marked the first freely elected assembly for all of Germany and ran until the end of the month. During heated and lengthy debates and negotiations, the body produced a constitution (Verfassung des Deutschen Reiches) which established a united empire adhering to the principles of parliamentary, representative democracy, a constitutional monarchy headed by a hereditary emperor—Kaiser. Whilst the Prussian king initially rejected the title that the assembly wanted to bestow on him on the grounds it would abrogate the rights of princes who led constituent states, the contentious gathering nonetheless provided model legislation for the Weimar Republic and the Grundgesetz (Basic Law) first adopted by West Germany and then the reunified republic. Much more information at the links above.