Romania

Romania (ルーマニア) is a country located in Central and Eastern Europe.

Background
The current area of Romania was the territory of at its peak.

Toaru Majutsu no Index SS: Agnese's Magic Side Work Experience
Romania was mentioned by Stiyl and Isabella. They discussed about what area will include when "Tu" alters the settings to redefine his territory as that of the Roman Empire at its peak.