"Enrico Scrovegni, the knight, saves his honest soul [...] 

And indeed he had this temple solemnly dedicated to the

Mother of God

So that he would be blessed with eternal mercy..."  Inscription on the Tomb of Enrico Scrovegni

The chapel contains an extensive programme detailing the life of the Blessed Virgin from apocryphal texts, beginning before her miraculous birth.  Here her father, St. Joachim is rejected by the Hebrews.  A separation of the extended Holy Family and the patron from Jews and the condemned practice of usury?