10 most difficult Europe riddles

Italian is an official language in Italy, San Marino, Switzerland and the Holy See. Italian is also used in some parts of Slovenia and Croatia.

Spain borders France, Portugal, Andorra, Morocco (Ceuta) and UK (Giblartar)

Prior to Brexit on January 31, 2020, the United Kingdom's exit from the European Union, London was the largest city in the European Union. Now, however, Berlin is the largest city in the European Union with 3.7 million people in its city limits. Berlin is followed by Madrid, Rome, Paris, and Bucharest.

Vitoria-Gasteiz is the seat of government and the capital city of the Basque Autonomous Community and of the province of Araba in northern Spain. It holds the autonomous community's House of Parliament, the headquarters of the Government, and the Lehendakari's official residency. Vitoria-Gasteiz's vicinity is home to world-renowned wineries such as Ysios

Vesuvius is the only volcano on the European mainland. The rest of them are located on European islands, the most in Iceland (around 20).

Poland bordered Germany, the Protectorate of the Czech Republic and Moravia, Slovakia, Hungary, Romania, the USSR, Latvia and Lithuania.

Whit 162,000 sq meters of floor area, the Palacio Real is more than twice as large as Versailles, Buckingham Palace or Royal Palace in Stockholm. It is the largest functioning palace in Europe (however, king of Spain doesn't live here any more).

The Dâmbovița is a river in Romania, which passes through Bucharest. The city's folklore refers to the waters of the Dâmbovița as "sweet", "light and clean". However, toward the end of the 18th century, as the population of Bucharest increased, the river ceased to be so clean, hence the need of the aqueducts to bring clean water. The earliest aqueducts with public fountains were built during the rule of Prince Alexander Ypsilantis.

The convent was ruined in the 1755 Great Lisbon Earthquake, which destroyed the city, killed possibly 100.000 of its inhabitants and disrupted the colonial ambitions of Portugal. The church was left unrestored to remind the tragedy.

Andorra is the only part of the world where Catalan is the only official language. It is used by Andorran television and radio stations.