>>671492Because thats the date when Constantinople fell and Evropa collapsed 😭
In reality, after centuries of mismanagement and unlucky historical events Constantinople was reduced to a fishing village with population of just 10000 people. Eastern Rome was basically a city state that happened to be bigger and more powerful half a millenia ago. Peasants would farm their crops between old ruins and goats grazed on the old forums. Everytime an old building collapsed it was used a quarry, so the buildings in tha smallish city looked completely medieval at that point.
Later on under Ottoman rule Constantinople would grow back to a Justinian size at around 400000 people.