Świętojańska is one of the streets marked out at the time of the incorporation of Warsaw, at the end of the 13th century. From the very beginning, it was one of the most important streets in the city. In a broader perspective, it was part of the Czersk-Zakroczym route, which was regulated by streets within the city walls. Within the city, it led from the southern city gate to the Market Square.
The history of Nowomiejska Street begins with the location of Warsaw. Marked from the north-west corner of Old Town Market, it led to the northern city gate, becoming an important communication artery of the city. As in the case of the area behind the southern city gate (later Krakowskie Przedmieście), over time, this area also turned into a parking and market square. However, when at the beginning of the 15th century a new city was founded - New Warsaw, the street was called Nowomiejska street, as a road connecting both cities.