Since this ruler codified his empire's laws into a book called the Kanun-name, he's often called "The Lawgiver" in the Middle East.
This ruler created a law that guaranteed pay to laborers called rayas who worked on the land of his cavalry.  To try to convince this ruler into an alliance, diplomat Antonio Rincon presented him with a magnificent four-tiered tiara made in Venice. This ruler gave back the Holy Crown to Jan Zapolya and officially recognized Zapolya as voivode. Various letters begged this ruler to liberate the French king captured at the Battle of Pavia, (*) Francis I, who attempted to forge a controversial alliance with him. Since this ruler codified his empire's laws into a book called the Kanun-name, he's often called "The Lawgiver" in the Middle East. His wife was a Ukrainian Christian woman named Roxelana. For 10 points, name this Ottoman ruler known as "The Magnificent."
This ruler created a law that guaranteed pay to laborers called rayas who worked on the land of his cavalry.  
Suleiman the Magnificent [or Suleiman the Lawgiver] 