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 Byzantine Empire reached its height under the Macedonian emperors (of Armenian and Greek descent) of the late 9th, 10th, and early 11th centuries, when it gained control over the Adriatic Sea, southern Italy, and all of the territory of tsar Samuel of Bulgaria.