[3] At that time the new city encompassed the territory of the New Town Market Square and streets - Freta, Kościelna, Koźla, Przyrynek, Stara and Zakroczymska.

The largest investment of that time was the Sigismund Augustus bridge built between 1568-1573 by Erazm Cziotko (c. 500 m (1,600 ft) long).

The disastrous time of the Swedish-Brandenburgian invasion (1655–1660), left the predominantly timber buildings of the New Town burned, but because of those events many beautiful and more permanent buildings were erected (the Town Hall, built in 1680; St. Kazimierz Church, 1688–1692; the Kotowski Palace, 1682–1684; the Holy Spirit Church, 1707–1717; and the ornate chapel of the Kotowski family, constructed between 1691-1694) by the most prominent Warsaw architects (especially Tylman Gamerski).

During the Warsaw Uprising (1 August – 2 October 1944) the New Town was completely destroyed due to the extensive bombardment of the insurgent positions by the Germans.

The image of a girl with a unicorn can still be found in the main square, it decorates the top of the well in front of the St. Kazimierz Church.