The major Allies' indecision on how to conduct their affairs without provoking a united protest from the lesser powers led to the calling of a preliminary conference on protocol, to which Talleyrand and the Marquis of Labrador, Spain's representative, were invited on 30 September 1814.
Suuremate liitlaste otsustamatus, kuidas korraldada oma asju väiksemate riikide ühisproteste põhjustamata, viis esialgse konverentsi protokolli koostamiseni, kuhu Talleyrand ja Hispaania esindaja markii Pedro Gómez Labrador kutsuti 30. septembril 1814.