Explanation

City of Seven Hills, known as Rome

The original city of Romulus was built upon Palatine Hill

And the other six hills of Rome

1. Capitoline,
2. Quirinal,
3. Viminal,
4. Esquiline,
5. Caelian 
6. Aventine.

Rome is the capital city of Italy

Explanation

Belgium is often called the "Cockpit of Europe"

 It has been the site of more European battles than any other country

The term "cockpit" refers to the control center of an aircraft

Explanation

The new name of Leningrad is Saint Petersburg.

In a referendum held in 1991

The city of Saint Petersburg was founded by Tsar Peter the Great on 27 May 1703.

It became the capital of the Russian Empire 

Explanation

 The Baltic States are a geopolitical term for three countries in Northern Europe:

1. Estonia,
2. Latvia
3. Lithuania

All three countries are members of NATO, the European Union, the Eurozone, and the OECD.

The term Baltic stems from the name of the Baltic Sea 

Explanation

The land of Maple Leaves is a nickname for Canada.

This nickname comes from the maple tree.

Additional information 

Capital is Ottawa.

Currency is Canadian Dollar.

Official language is English; French.

Located in Continent North America.

Primary Religion is Christianity (But Secular Country).