Responding to the needs of individual pilgrims from all over the world who come to the Shrine of Divine Mercy in Krakow-Łagiewniki, the Congregation of the Sisters of Our Lady of Mercy has prepared a very functional guide to this holy place using QR codes. It contains not only information about the individual locations, but above all the message of the treasure of this place, the spiritual heritage of St.  Faustina, especially given by Jesus and recorded in her Diary. From now on, each pilgrim, scanning a QR code on a smartphone, will be guided by the sisters to a particular site, learn what meetings and conversations with the Inhabitants of Heaven St.  Faustina had there. With the help of a 3D map one can see the entire Shrine and move on to the next object. The guide has already been made available not only in Polish, but also in English, Spanish, Italian, French, Portuguese, Slovak, German and Russian. For other language areas, a scanned QR code automatically selects English.