Complex sentence: Currently under the reign of Empress Teodora I, the continent is known for its capital which is protected by the supposedly impenetrable'Grand Fortress', essentially a massive wall covering the main entrance to the continent.
Split into simpler sentences: Currently under the reign of Empress Teodora I, the continent is known for its capital. It is protected by the supposedly impenetrable "Grand Fortress", essentially a massive wall covering the main entrance to the continent.