Janet Delaney is a photographer based in Berkeley, California. A few years ago she published a book of her 1980s San Francisco images titled South of Market.
Take a look at these photos showing the Siege of Paris which led to French defeat in the Franco-Prussian War and the establishment of the Paris Commune.
Julien Knez from Paris, France found some photos of Paris taken between 1871 and 1968. Then he photographed the sites from the same angle.
Here you can see the photos of the same places, before and after the Syrian war of the city of Aleppo. Check out what war did to Aleppo.
Rio de Janeiro is known as one of the most dangerous cities in the world. BOPE is the only option to ensure a safer area for thousands of incoming Olympic tourists.