On March 10-11, Sr. Terezjana from the Krakow community and Sr. Eliasza from the Częstochowa community of the Congregation of the Sisters of Our Lady of Mercy will lead a retreat at Our Lady of Ostra Brama Parish in Krakow for children from primary schools No. 45, 114, and 128. The sisters will present the figure of St. Faustina and share the message of Mercy using engaging methods.