Answer: it is a name of independent trade unions in Poland established in 1980 in Poland. But it true role was a social movement that started opposing to Communist party (the only party, state-party) in Poland.
Explanation: It contributed significantly to the fall of Communism in Poland (1990). It was not the only anti-Communist movement in Poland at that time, but it was the most important.
The poor standing of Leopold the 2nd is most probably attributed to the role he had in the extermination of huge amounts of people in Belgian colonies at the time. This wasn't known at the time, but today we known that Leopold the 2nd had ordered a genocide over the Congonese people.
It is the oldest known wooden sculpture
hope this helps!
This came to be known as the American System developed by Henry Clay