After the union of Polish lands in the 14th century, the division into provinces and counties was introduced.

This period brought a notable development in settlement stability on Polish lands.

Around the year 1000, the population of Polish lands is estimated at about 1,000,000 to 1,250,000.

For 70 years Poles would work on developing their organization, increasing wealth and development of Polish lands.

Many trade routes went through the Polish lands, which facilitated the development of trade.

Beginning in the 6th century several waves of Scythian invasions went through the Polish lands.

Altogether, in 1914, 40 million tons of coal were excavated in the divided Polish lands.

Behind me stays a Polyphemus of the Polish lands.

The act created the conditions necessary for the development of the capitalist system on central Polish lands.

It was the largest peasant uprising on Polish lands in the 19th century.