After the foundation of New Town in Prague in 1348, Charles Square was defined as the centre of its southern part.Marek Lašťovka – Václav Ledvinka a kol., Pražský uličník I.: Encyklopedie názvů pražských veřejných prostranství, Libri, Praha, 1997, pp. 320–322. It was originally called Large Market, New Town Square or the Square of the Upper Town, from the 15th century until 1848 it was known as Cattle Square, and since 1848 it has been called Charles Square (after Charles IV, the founder of New Town).

Another photograph of an air raid water reservoir comes from the area of Florenc in front of the building of the Prague City Museum (no.1554/52). The photograph is mainly interesting for the buildings in the background. In addition to the dominant Neo-Renaissance building of the museum designed by Antonín Balšánek from 1896–1898 (on the left), which still serves as a museum today, the image also shows an adjacent building that no longer exists. This smaller building used to be a café pavilion built in the newly established city park, behind the abolished city gate at Na Poříčí.

The water reservoir on Kinsky Square at the foot of Sudek's favourite garden on Petřín hillside was situated near his apartment and studio, at Ǔjezd 28, a distance of about 500 m on foot.

During the Second World War, water reservoirs were built at public places in Prague to supply water in case of fire caused by air raid attacks. Zdeněk Wirth named a total of 67 reservoirs as well as 40 “basins” and other defense measures in Prague parks.Zdeněk Wirth – Josef Sudek, Pražský kalendář 1946. Kulturní ztráty Prahy 1939–1945, Nakladatelství V. Poláčka, Praha, 1945, unpaginated.

An air raid water reservoir, used for fighting fire during the war, was built in the middle of Hradčanské Square in 1944. This site is well documented thanks to archeological excavations carried out by the castle archeologist Ivan Borkovský, who made an important discovery while excavating the reservoir. He found the first Romanesque building constructed in the area west from the gates of today's castle, on the site of the former town of Hradčany.

“Prague has lived through all the successes and triumphs of this state and nation and has suffered all its defeats, all its troubles and all its pains.

An air raid water reservoir on Old Town Square was built in 1943 in the close vicinity of the Jan Hus monument created by Ladislav Šaloun (1915). It remained there until the mid-1970s.Kateřina Bečková, Zmizelá Praha. Dodatky I. Historický střed města, Paseka, Praha – Litomyšl, 2003, fig. 4 (nepag.). An air raid water reservoir on Old Town Square was built in 1943 in the close vicinity of the Jan Hus monument created by Stanislav Sucharda (1915). It remained there until the mid-1970s.