Complex sentence: In the seventeenth century the house where he was born was given to the jesuits, they built there, near the birthplace of its founder, a religious complex, of which the highlight is its basilica.
Split into simpler sentences: In the seventeenth century the house where he was born was given to the Society of Jesus. The Order built there, near the birthplace of its founder, a religious complex, of which the highlight is its basilica.