Im doing a crossword puzzle for my World History Honors class, and I'm stuck on four problems. 1) _ _ L _ Polo wrote a book on his travels to China. 2) _ L _ _ _ N _ _ is the most important Italian art center. 3) Palestrina wrote M _ _ _ _ for the church. 4) Palestrina: Italian, wrote C _ _ _ R _ _. Any help would be great.