Stone construction is a simple technique that has been used since the earliest human civilizations. These days, stone is regaining popularity in contemporary architecture thanks to the diversity of results that can be achieved by the union of stone pieces. Whether it's the size, the type of cut, or the color of the material, the truth is that the use of stone can add incredible textures to architectural designs. Read on for a selection of 13 photos that allow us to marvel at stone's beauty and expressiveness, created by renowned photographers such as Erieta Attali, Kyungsub Shin and Dimitris Kleanthis.

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This August 19th is World Photo Day, which celebrates photography on the anniversary of the day on which France bought the patent for the daguerreotype, one of the earliest photographic processes, and released it to the world for free in 1839. At ArchDaily, we understand the importance of photography in architecture—not only as a tool for recording designs, but also as a discipline that many of us enjoy. To celebrate the occasion, we decided to reveal the most popular images ever published on ArchDaily, as selected by you, our readers. Using data gathered from My ArchDaily, we have ranked the 100 most-saved images from our database; read on to see them.

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North light, south light, warm light and cool light – the diversity of skylights mean they can illuminate any space. Both a window and a ceiling, the hybrid nature of a skylight enables it to be a key element used in architectural spaces. The cool light of a north skylight is instrumental in creating a space to focus and work, while its south-facing counterpart lights up a space with that golden glow. Through its flexibility also come opportunities for expression, from its shape to its angle. Is a skylight a ribbon weaving through a roof panel? Or is it a series of dotted openings creating a mosaic of daylight on the floor? Check out these 16 examples of contemporary spaces lit by this key element below:

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