Complex sentence: On 5 June, 1861, Lodovico married Mathilde Ludovika, Duchess in Bavaria, the fourth daughter of Maximilian, Duke in Bavaria and Princess Ludovika of Bavaria.
Split into simpler sentences: On 5 June, 1861, Lodovico married Mathilde Ludovika, Duchess in Bavaria. She was the fourth daughter of Maximilian, Duke in Bavaria and Princess Ludovika of Bavaria.