The construction of a 250-foot-high triumphal arch in Washington DC designed by Atlanta-based Harrison Design, is set to begin "over the next two-week period".

A thousand tonnes of volcanic rock replace concrete and steel in Petra Heights, a housing development in north London by architecture studio Groupwork and engineer Webb Yates.

The modernist 22 Parkside house in Wimbledon, London, by Richard and Su Rogers has been given over to conservation charity The National Trust.

Technology company Apple has released its first folding smartphone that has the largest screen of any iPhone. Called iPhone Duo, the phone is the first folding-screen device in Apple's product lineup. It features a central hinge mechanism as well as an external screen visible when the device is folded.

Visitors to this woodland cabin in East Sussex enter via a planted roof terrace, which its architect, British studio Built Works, has "devoted entirely to the ritual of bathing".

Polish-American architect Daniel Libeskind has been named architecture laureate for this year's Praemium Imperiale awards by the Japan Art Association.

A metal tunnel guides visitors from underground into a lofty exhibition hall within a tram depot at the Centre for Contemporary Arts Tashkent, which was designed by French architecture practice Studio KO in Uzbekistan's capital.

Architecture studio Orms has submitted a planning application to transform the BT Tower in London into a hotel with a rooftop swimming pool for American hotelier MCR.

Local architecture studio Oatelier has completed Husárik Hut, a barn-like timber home in Slovakia that was designed as a contemporary take on the area's traditional shepherd's huts.