The square, located along the "Royal Road," an ancient road linking the city's palace with the Old City, is named for the three crosses that are located there. One of them is the cross at the top of the church in the center of the square and two others stand at the other end of the square.
During World War II the square was a central and busy place in the city of Warsaw. In the square was the German headquarters, that brought Jewish children here during the war. They slipped out of the Ghetto and pretended to be Polish. It was precisely here that they made their living selling cigarettes and matches. Joseph Jamian wrote the story of a group of children in the book "The Cigarette Sellers from Three Crosses Square." In 1944, towards the end of the war, the church was completely destroyed after the German planes bombed it.
The cigarette-selling children used to get up at dawn and reach the cigarette dealers to make up their cigarette supply. From there they went to the square and throughout the day they sold their cigarettes to passers-by.
In the evenings they used to go and bathe in the public baths. In order not to be discovered circumcised, the children bribed the guards not to let anyone else in while they were in there bathing.
After bathing, the children used to go to the home of an old lady they called "Grandma." With her, they were free to unload the day's experiences and used to compare the amounts of cigarettes they sold. Beyond the sale to buyers, a simple operation in those difficult times, the children conducted a hidden competition between them, for selling and money. Each day they compared the "results" and the daily winner received a lot of respect from his friends and was crowned winner of the competition.