Question: A Culă is a type of building originally made to be able to fortify the ruling class against invasions during which wars?
Sentence (from "Background of the Greek War of Independence"): In the 18th and 19th century, as revolutionary nationalism grew across Europe—including the Balkans (due, in large part, to the influence of the French Revolution)—the Ottoman Empire's power declined and Greek nationalism began to assert itself, with the Greek cause beginning to draw support not only from the large Greek merchant diaspora in both Western Europe and Russia but also from Western European Philhellenes.
Relevant evidence: No