Foster + Partners has revealed its plans to add a large overhanging rooftop extension to the Bilbao Fine Arts Museum, as part of its renovation of the institution in northern Spain. More about Foster + Partners to add giant "floating pavilion" to top of Bilbao Fine Arts Museum
An exhibition of monumental geometric black sculptures by the late American designer Tony Smith on display at Pace Gallery in Manhattan brings together three works for the first time. More about New York City gallery exhibits three massive black sculptures by Tony Smith
Barend Koolhaas created Eenwerk & IBO, a gallery and graphic design studio, by slotting a basalt and steel structure between two brick houses, in Amsterdam. More about Barend Koolhaas slots steel and basalt gallery between two Amsterdam houses
A twisted cube clad in zinc armour forms the State Gallery of Lower Austria, designed by Marte Marte Architecten in the town of Krems. More about Marte Marte Architekten builds distorted metal cube to house Austrian art gallery
Chinese firm Atelier FCJZ has completed an art gallery that bridges a river in the city of Jishou, to encourage people to engage with art on their daily commute. More about Jishou Art Museum by Atelier FCJZ doubles as a pedestrian bridge
These exclusive photographs show Neri&Hu's Aranya Art Center, which opens today in Qinhuangdao on the Aranya Gold Coast in China. More about Neri&Hu completes Aranya Art Center in Qinhuangdao
Architecture studio Office Kersten Geers David Van Severen designed the new Tim Van Laere Gallery in Antwerp as five raw concrete boxes with pink shuttered doors. More about Five concrete boxes with pink doors form the Tim Van Laere Gallery in Antwerp
A former Frieze artistic director has established a new art and design fair in New York that offers exhibitors fewer restrictions and lower prices. More about Object & Thing launches in New York as alternative to traditional art and design fairs
Five aviation fuel containers on the former Longhua airport in Shanghai have been transformed into art and culture park Tank Shanghai, by local studio Open Architecture. More about Open Architecture converts airport fuel tanks into gallery spaces
A scale model of a concrete housing complex features alongside architectural photography in this New York exhibition, detailing the works of Polish modernist architect Jadwiga Grabowska-Hawrylak. More about Polish modernist Jadwiga Grabowska-Hawrylak is celebrated in Manhattan retrospective
6a Architects has extended the MK Gallery in Milton Keynes with a rectangular steel box that pays homage to the English town's "iconic" masterplan. More about 6a Architects completes geometric silver extension to MK Gallery in Milton Keynes
Design gallery The Future Perfect has opened an exhibition space inside a townhouse in New York's West Village, filled with collectible homeware and featuring a wooden staircase designed by David Chipperfield. More about Casa Perfect New York gallery includes David Chipperfield staircase
The Swedish Centre for Architecture and Design in Stockholm has a new exhibition space within one of its lofty galleries, featuring wire mesh surfaces, a huge round window and a ramp winding round its exterior. More about Dehlin Brattgård Arkitekter creates "robust machine for experimental exhibitions" at ArkDes
Terrassenhaus Berlin is a concrete mixed-use block in Berlin by Brandlhuber+ Emde, Burlon and Muck Petzet Architekten that has a series of external terraces. More about Terrassenhaus Berlin has a facade of stepped concrete and curtains
Chasper Schmidlin and Lukas Voellmy have excavated into a mountain, and restored a 12th-century monastery in the Swiss Alpine town of Susch, to create an art museum. More about Muzeum Susch in the Swiss Alps has galleries excavated from mountainside
David Chipperfield Architects has completed the London branch of art gallery Bastian, finishing its all-white interiors with grey stone detailing. More about David Chipperfield Architects completes London outpost of Bastian gallery
Leopold Banchini Architects gave the House for Architectural Heritage in Muharraq, Bahrain, retractable glass walls that open it up to its surroundings. More about Concrete exhibition space showcases Bahrain's architectural past and present
Herzog & de Meuron has updated its design for an arts building in Vancouver, which will be the Swiss firm's first project in Canada if approved. More about Herzog & de Meuron swaps wood for glass in Vancouver Art Gallery proposal
Scottish studio Collective Architecture has transformed a former observatory in Edinburgh into the Collective contemporary art centre, which is joined on its hilltop site by a new gallery, restaurant and welcome kiosk. More about Collective Architecture completes contemporary art venue on Edinburgh's Calton Hill
WORKac has unveiled its design for the Beirut Museum of Art in Lebanon, which features a facade of mismatched balconies that will be used to exhibit artwork. More about Balconies will double as exhibition space in WORKac's Beirut Museum of Art