Three categories of Polish conciliar fathers – participants of the Second Vatican Council – have been set apart. These categories have to do with their dignities, offices and ordinations (ordinaries, suffragan bishops and residents in Rome, higher superiors in orders). Prosopographical analysis of these people was carried out on the basis of 4 factors: education, intellectual formation, pastoral experience, participation in conciliar debates. Following conclusions have been drawn: 1) Vast majority had a doctoral degree. Mostly ordinaries had habilitation and profes-sorship. 2) Over 25% of Polish conciliar fathers studied at Roman universities and almost 75% had degrees from Polish universities. 3) Among the ordinaries the genera-tion of the office of a higher order’s superior – 1946-1955. Among bishops and resi-dents in Rome dominated the 1956-1965 generation, i.e. the hierarchy of the young. 4) In all four sessions of the Council only 10 bishops took part. 5) In the first session ordinaries were a majority. In the following sessions suffragan bishops and residents in Rome were a majority. 6) Public speeches were held mostly by ordinaries (75% of all speeches by Polish bishops). A special role was played by the president of Polish bishops’ conference – cardinal Stefan Wyszyński and Cracow’s archbishop Karol Wojtyła. 7) Different than in the case of public speeches, most animadver-siones (written remarks) were submitted by suffragan bishops and residents in Rome (over 56%). 8) Polish conciliar fathers were the most numerous delegation among bishops’ conferences from Middle-Eastern Europe. They were representatives of the silent Church behind the Iron Curtain. Their participation in the works of the Council had a decisive impact on the final documents of the Council.