Europe has been described as being at the heart of this.

The longest river in Europe.

Country with the highest birthrate.

The main language family in Europe.

The largest company in Europe.

Defining Europe in opposition to other areas.

The most active volcano in Europe.

The second most populated country in Europe.

The two main branches of Christianity.

The oldest independent state.

Ancient geographers erroneously linked this to the open ocean.

Body of water that is stagnate below 478 feet.

When all habitations lie no more than 5 km from others in at least six different directions.

Roman emperor who issued an edict of toleration for Christianity.

The country with the most castles.

Three main cultural traits used to define Europe.

An area of low land reclaimed form a body of water by building dikes and draining water.

Brought milder conditions between the ninth and twelfth centuries.

English is apart of this language subfamily.

Country with the highest life-expectancy.

A well educated population, a healthy population, and an urbanized population all describe these characteristics of Europe.

A patch of flat, unflooded land.

Main form of migration from the sixteenth to the nineteenth centuries.

Polish is apart of this language subfamily.

Country with the oldest zoo in the world.