Simplify the following text for a Grade 12 native English-speaking person.
Original: The `` Monumento dei quattro mori '' ( `` Monument of the Four Moors '' ) , dedicated to Grand Duke Ferdinando I de ' Medici of Tuscany , is one of the most important monuments of Livorno .
Simplified: The `` Monumento dei quattro mori '' ( `` Monument of the Four Turks '' ) , dedicated to Grand Duke Ferdinando I de ' Medici of Tuscany , is one of the most important monuments of Livorno .