The Wars of the Roses have put Edward IV on the throne of England, Lorenzo de' Medici's court shines brilliantly, and Duke Galeazzo Maria Sforza plots in Milan.... » 

The Wars of the Roses have put Edward IV on the throne of England, Lorenzo de' Medici's court shines brilliantly, and Duke Galeazzo Maria Sforza plots in Milan. But this is a changed world, and medieval Europe is dominated by the threat from the Byzantine Empire. «