Mother Teresa Ewa, née Countess Potocka of the Sułkowska (family) princes, after eight months of practice in the House of Mercy in the Laval (France) returned to Poland and – at the invitation of Archbishop Zygmunt Szczesny Feliński – took over the shelter ("Dom Schronienia" pol) in Warsaw for girls failed morally. November 1, 1862 Archbishop Feliński dedicated a chapel and a house for girls. That date was adopted as the date of creation" 'the Congregation of the Sisters of Our Lady of Mercy'" in Poland.