Constantinople was built-in the year 330 by Constantine. It was captured in both the years 1204 and 1261. It lost much of its populations from the black death in the years 1346-1349.
A problem arose when Constantine the Eleventh realized that Mehmed the Second (the Sultan of Ottoman) was preparing for war. He call on Europe for help but because of the papal schism they were still at odds. He gained 7,000 men and 2,000 of them were foreigners. Mehmed had 50,000-80,000 men this making the odds more in his favor (he also had many ships and cannons).
Constantine really tried to defend his city but it still fell. It is believed that the Ottomans still did suffer much from this battle. Mehmed looted the city for three days and then allowed the citizens to continue living their lives. They were now under the power of the Ottoman Empire though. This was the end of the remains of the Roman Empire. It also marks the end of the Middle Ages. Constantinople’s name was changed to Istanbul and became the capital of the Ottoman Empire.
The fall of Constantinople led to many changes. Some of which would be the use of cannons would become more popular or the old religions of the time were pretty much gotten rid of. This event was yet another part of God’s perfect plan and he used it for the glory of Him. Sometimes terrible things like war are used for the best of reasons.