During the Nazi occupation, Diana (Helena Frąckiewicz) served as a nun in a Dominican Sisters convent in Kolonia Wileńska, fifteen kilometres from Wilno.
Together with other sisters in that convent, she gave shelter to a dozen or so group of Jews, who were admitted into the convent by the Mother Superior, Sister Bertranda (Janina Siestrzewitowska aka Anna Borkowska)
Those sheltered included Abe Kowner, Aria Wilner, Chajka Grosman, Edek Boraks, Chum Godot, and Israel Nagel, future activists of the resistance movement in Warsaw and Vilnius ghettos.
In 1943, Germans arrested the Mother Superior (the "Righteous Among the Nations" Anna Borkowska) and closed the convent.
