What was one disadvantage of Constantinople's location?

The location of Constantinople is a prime location for attacks.

Explanation:

One of the disadvantages of Constantinople when it comes to its location was the fact that it made it prone to attacks. Constantinople was located in an important trade route, at the union of three continents. Moreover, it was located in the narrow passage that joins the Black Sea with the Aegean Sea. This made it a prime location for attacks, both from the North and from the South.

the only disadvantage of Sweden's location would be that it's located relatively close to the north pole, thus it's really cold. Also being close to the north pole, in the summer the sun is up all day, in the winter the sun doesn't come up.