Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Mantua and Sabbioneta' has mentioned 'Duke' in the following places:

Occurrence Sentence	Text Source
When she moved to Mantua from Ferrara (she was the daughter of Duke Ercole the ruler of Ferrara) she created her famous studiolo firstly in Castello di San Giorgio for which she commissioned paintings from Mantegna, Perugino and Lorenzo Costa.	WIKI