1453, but Rome Did Not Fall

In 1453, Constantinople fell and the Byzantine Empire fell. Rome's 2,206 years of history came to an end at this moment. What if Constantine XI had the ability and ambition but no opportunity? Can become the Grand Duke of Morea sooner Can win the battle to defend the Corinth Wall? If we can help Hunyadi and Skanderbeg win in the second battle of Kosovo Would Rome's fate have been any different? This article explores this possibility