[2] In 1537 the town became Royal property and in the second half of the 16th century reached 1200 inhabitants based round the brewing and transport industries.

From 1806 to 1807 a French cavalry unit was stationed in the town as part of the Napoleonic wars, and from 1808 to 1811 this was replaced by the Polish 1st Regiment mounted rifles.

[4] The following year she established a nationally renowned school for girls, where women from low-income families could also receive an education.

[4] In September and October 1914 Piaseczno was the site of fierce fighting between German and Russian forces in the battle for Warsaw.

In November 1918, German gendarmerie surrendered to local Poles and the town was restored to Poland, which just regained independence.

On June 4, 1928, Polish President Ignacy Mościcki laid the cornerstone for the folk house and in 1933 Marshal Józef Piłsudski was made an honorary citizen of the city.

World War II began for the city on 9 and 10 September 1939, when the Polish 54 light artillery regiment fought a skirmish with a German armored division.

[14] During the uprising, the occupiers perpetrated two massacres of Poles within the present-day town limits, killing over 50 people.

[17] The German occupation ended on January 17, 1945, when the Polish 1st Warsaw Armoured Brigade entered the town without a fight.

Piaseczno was the seat of a Hasidic dynasty founded by Rabbi Kalonymus Kalman Shapiro, currently maintained by his extended family in Israel.