Balloons flying over the city viewed by a couple from the Terrace Watchtower in Warsaw, Poland.
A balloon is a flexible bag filled with a gas, such as helium, hydrogen, nitrous oxide or air. Early balloons were made of dried animal bladders. Modern balloons can be made from materials such as rubber, latex, polychloroprene or a nylon fabric.
The first balloon was invented by Brazilian-born Portuguese priest, Bartolomeu de Gusmão, and the first public exhibition was to the Portuguese Court on August 8, 1709, in the hall of the Casa da India in Lisbon. The rubber balloon was invented by Michael Faraday in 1824. The more familiar latex balloons of today were first manufactured in London, 1847, by J.G. Ingram but mass production did not occur until the 1930s.
The word balloon was originally derived from the French word ballon, meaning large ball. This was in turn probably from the latin ballone, but another possible source for it was balla, meaning ball, from Old High German. And viewed large you can read 'taras widokowy' the Polish for 'Terrace Watchtower'.