Complex sentence: Born into one of the most important families ("House of Mocenigo ") of the Venetian aristocracy, he was a famous"Doge" of the Republic of Venice in the 18th century, when the power of Venice started to decline.
Split into simpler sentences: Born into one of the most important families ("House of Mocenigo ") of the Venetian aristocracy. He was a famous"Doge" of the Republic of Venice in the 18th century, when the power of Venice started to decline.