Verona is a city in northeastern Italy on the banks of the Adige River. Two of William Shakespeare’s plays, Romeo and Juliet and Two Gentlemen of Verona, are set in the city.

The Vatican City is an enclaved city-state within the city of Rome and the official seat of the Holy See of the Roman Catholic Church.

St. Peter’s Basilica is a Roman Catholic cathedral in Vatican City. St. Peter’s is considered one of the holiest Catholic shrines.

Poland is a country in central Europe, and its capital is Warsaw. World War II began with the German invasion of Poland in 1939, and more than six million Poles died in the war.

A central, landlocked country in Europe, Switzerland gained its independence from the Holy Roman Empire in 1648. Switzerland is known for its long history of armed neutrality as well as its wealth.

Buenos Aires is the capital of Argentina and is located along the Río de la Plata. It is an autonomous district rather than part of the Buenos Aires Province.