Algeria
© Wikimedia Foundation / old Man with Charm/flickr.com
Images like this were often found on postcards.
Germany
© Preus museum/flickr.com / Karlsfriend/flickr.com
On the left we see Gertrude and Ursula Falke.
Nepal and China
© old Man with Charm/flickr.com / OnThisDay & Facts/twitter.com
England
© weheartit.com / Warsaw1948/flickr.com
Left: A schoolgirl in Kensington, London.
Right: A group of children on their way to the Serpentine Lake in Hyde Park, London, in order to do some fishing.
Scotland and Ireland
© Wikimedia Foundation / irishcentral.com
The photo on the right is one of the first color photographs ever taken in Ireland, shot around 1913. It shows a 14-year-old girl in traditional dress.
Romania and Albania
© PostMan/flickr.com / discoveringalbania.com
The photo on the right shows two Albanian girls aged around 13-14. The girl on the left would go on to be known as the world famous Mother Theresa.
Japan
© prettybegonia.tumblr.com / Wikimedia Foundation
Left: Maiko girls (who would become geishas) relax on a balcony.
Right: Students at a school in Fukuoka, which was the first place to introduce the ’sailor-style’ school uniform seen here.
Argentina and Mexico
© shorpy.com / Wikimedia Foundation
The serious-looking girl on the right is a 13-year-old Frida Kahlo.
Spain
© spanishroyals.tumblr.com / Wikimedia Foundation
Left: Two girls, Maria-Christina and Beatrice.
Right: The 16-year-old Federico García Lorca, a Spanish poet.
Poland and Estonia
© realityayslum.tumblr.com / vintageyoungins.tumblr.com
The Estonian girls are imitating poses from a film, in an attempt to look like adults.
Greece and Cyprus
© morekisdairy.wordpress.com / A Good Friend/flickr.com
Left: A young Greek partisan, Konstantinos Mourikis.
Right: A class from the Maria Christodoulou School.
Hungary
© Wikimedia Foundation / Nori/flickr.com
Austria and Luxembourg
© carolathhabsburg.tumblr.com / my-little-time-machine.tumblr.com
Left: Prince Ernst of Hohenberg, one of the four children of the Austrian Archduke Franz Ferdinand.
Right: Princess Antonia of Luxembourg.
India
© upyim.com / oldindianphotos.in
Australia and New Zealand
© State Library of NSW / Wikimedia Foundation
The USA
© outofmygord.com / blog.usa.gov
Left: A 16-year-old Walt Disney.
Right: A girl from the Kiowa tribe of Native Americans.
Belgium
© The Library of Congress / carolathhabsburg.tumblr.com
Brother and sister: Prince Leopold and Princess Louise of Belgium.
The Netherlands
© vintag.es / soyouthinkyoucansee.tumblr.com
Sweden and Finland
© Miss Mertens/flickr.com / thewidowflannigan.tumblr.com
The girl on the left is Princess Ingrid of Sweden.
Russia
© klimbim2014.wordpress.com / russkievesti.ru
France
© John Mathew Smith/flickr.com / Wikimedia Foundation
On the right — a young René Lacoste, future tennis player and founder of the Lacoste brand.
The Philippines
© thechive.com / Okinawa Soba/flickr.com
Italy
![Wikimedia Foundation](\"https://commons.wikimedia.org/wiki/File:Abb._326._Junge_Kabylin_aus_Algier.jpg"){kind=link}
![Karlsfriend/flickr.com](\"http://farm6.staticflickr.com/5264/5574552612_8db564d627_z.jpg"){kind=link}
![Wikimedia Foundation](\"https://commons.wikimedia.org/wiki/File:Wellington20.jpg"){kind=link}
![Wikimedia Foundation](\"https://commons.wikimedia.org/wiki/File:Students_of_Fukuoka_Jogakkou_1920%27s_Fukuoka_Japan.JPG\"){kind=link}
![Wikimedia Foundation](\"https://ru.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D0%BE,_%D0%A4%D1%80%D0%B8%D0%B4%D0%B0#/media/File:Guillermo_Kahlo_-_Frida_Kahlo,_June_15,_1919_-_Google_Art_Project.jpg"){kind=link}
![Wikimedia Foundation](\"https://commons.wikimedia.org/wiki/Category:Federico_Garc%C3%ADa_Lorca#/media/File:Lorca_(1914).jpg"){kind=link}
![Wikimedia Foundation](\"https://commons.wikimedia.org/wiki/Category:1918_photographs#/media/File:Girls,_ribbon,_smile_Fortepan_7827.jpg"){kind=link}
![Wikimedia Foundation](\"https://commons.wikimedia.org/wiki/File:Maorim%C3%A4dchen.jpg"){kind=link}
![Wikimedia Foundation](\"https://upload.wikimedia.org/wikipedia/commons/5/5b/Rene_Lacoste_1922.jpg"){kind=link}