Complex sentence: Through the influence of her father, including an arranged marriage to Gian Giordano Orsini she wielded extraordinary wealth and influence within and without the Roman Curia; in particular, she negotiated a peace between Julius II and the Queen of France.
Split into simpler sentences: Through the influence of her father, including an arranged marriage to Gian Giordano Orsini, she wielded extraordinary wealth and influence both within and beyond the Roman Curia. In particular, she negotiated a peace between Julius II and the Queen of France.