The architecture style is different. romanesque churches came first. they were bulky, strong and had really thick walls. their windows were regular roman arched shapes. they usually have lower ceilings and not much light inside.
Gothic cathedrals came later. they have pointed arches, lots of tall windows for light stained glass and flying buttresses to help support the higher and thinner walls.
The course of the Nile River flowed north from its sources in
Ethiopia through sedan and Egypt and spread out into a delta at
Mediterranean Sea. Glad to help.
I think it has something to do with dry crops.
