Which of the following areas of europe had not become a unified nation under a single ruler by the 18th century? germany spain austria russia

To answer the question. Germany is the area of Europe had not become a unified nation under a single ruler by the 18th century. Germany the state of Bavaria was a separate kingdom well into the 1880's Neuschwienstien was commissioned by Bavarian King Ludwig II in about 1878

In order to protect states' rights, the Articles set strict limits on congressional authority. Under the Articles, the states, not Congress had the power to tax. Congress could raise money only by asking the states for funds, borrowing from foreign governments, and selling western lands.