Complex sentence: Several older myths, dating back even to the early 16th century, already purported to identify connections between the French and the Ottoman monarchies, but have been found to be politically motivated fabrications, intended to justify alliances between the two (supposedly related) monarchies.
Split into simpler sentences: Several older myths, dating back even to the early 16th century, already purported connections between the French and the Ottoman monarchies. These have been found to be politically motivated fabrications, intended to justify alliances between the two (supposedly related) monarchies.