The correct answer to this open question is the following.
Although there are no options attached or further references, we can comment on the following.
I think some of the challenges facing those restoring the Hagia Sophia church in Turkey are the following.
First, the budget needed to continually restorative the impressive building. Next, the qualified persons to do it. They need specialists in engineering and art to do the kind of conservation needed.
For a monumental structure like Haga Sophia, it is required to have a high budget to do permanent maintenance works as a preventive measure, as well as to correct the problems caused by the pass of time such as erosion, cracks in the walls, humidity.
The geographic feature which served as a barrier to the political union of the Greek city-states and their independence from each other was the numerous mountains all over the geography of the Hellenic Peninsula or Greek Mainland.
Based on the map I've attached, I'd say that Christianity spread to
most of the Roman Empire by 476 AD. If you look at the map, you will see that before 325, there were some places in Spain and Italy mostly where Christianity existed, however, after that year, it only continued spreading throughout Europe, which mostly belonged to the Roman Empire at the time.
The "Third World" was defined as the unaligned countries that the US and the Soviet Union were trying to bring into the fold, and thus became a political battleground. I Hope I could help! :)
Have a wonderful rest of the day.
They were called the Minnesinger.
Minnesingers were traditional singers and poets who lived between the 12th-14th Century Germany and performed the Minnesang (love songs).
The Minnesingers could belong to a high noble families but many were wandering artists who would go village to village to sing and earn a living.
Little accurate information is available in modern times though some of the later work from the 15th Century survives to this day.
