Higher education institutions around the world make use of online proctoring for tens of thousands of exams. The 17 campuses of the University of North Carolina proctor between 30,000 and 40,000 exams online per year. At the fully online Western Governors University, 30,000 exams are proctored online each month.
In the east, it continued as the Byzantine Empire until the death of Constantine XI and the fall of Constantinople to the Ottoman Turks in 1453 CE. The influence of the Roman Empire on western civilization was profound in its lasting contributions to virtually every aspect of western culture.
The Ottoman Empire lasted 700 years. Holy Roman Empire, with all It's ebbs and Flows, (Mostly Flows) Lasted from 10th century to 18th century for almost 800 years. Eastern Roman Empire, (Byzantium) lasted for 1100 years though it was a Vassal and pale shadow of it's glory by the last part. And Ethiopian empire, the only African Nation to escape Western Dominance in Africa from 12th century to 20th century. 800 years till 20th century!