Answer the questions at the end based on the text.

Poland, officially the Republic of Poland, is a sovereign country in Central Europe. It is a unitary state divided into 16 administrative subdivisions, covering an area of with a mostly temperate climate. With a population of over 38.5 million people, Poland is the sixth most populous member state of the European Union. Poland's capital and largest city is Warsaw. Other cities include Kraków, Wrocław, Poznań, Gdańsk and Szczecin. 

The establishment of a Polish state can be traced back to 966, when Mieszko I, ruler of a territory roughly coextensive with that of present-day Poland, converted to Christianity. The Kingdom of Poland was founded in 1025, and in 1569 it cemented a longstanding political association with the Grand Duchy of Lithuania by signing the Union of Lublin. This union formed the Polish–Lithuanian Commonwealth, one of the largest (about 1 million km²) and most populous countries of 16th and 17th century Europe with a uniquely liberal political system which declared Europe's first constitution. 

Following the partitions of Poland at the end of the 18th century, Poland regained its independence in 1918 with the Treaty of Versailles. In September 1939, World War II started with the invasion of Poland by Nazi Germany, followed by the Soviet Union invading Poland in accordance with the Molotov–Ribbentrop Pact. More than six million of Poland's citizens died in the war. After World War II, the Polish People's Republic was established as a satellite state under Soviet influence. In the aftermath of the Revolutions of 1989, most notably through the emergence of the Solidarity movement, Poland established itself as a democratic republic.

1. what country is the article about?
2. what is it's official name?
3. what is the earliest date  in the article?
4. what happened then?
5. by who?
6. what religion was he?
7. when did the monarchy come into being?
8. what was signed in 1569?
9. what did it form?
10. was that big?

Numbered answers:
1. Poland
2. The Republic of Poland
3. 966
4. Polish state established
5. Mieszko I
6. Christian
7. 1025
8. Union of Lublin
9. Polish–Lithuanian Commonwealth
10. Yes