Behind today's A-Zdvent calendar window is Brazilian architect Isay Weinfeld, who we recently interviewed about his new monograph and exhibition in New York. We've also featured a string of impressive São Paulo residences by the architect, including a house with a floating spiral staircase made from Brazilian ironwood and a home made up of seven boxy volumes, all made using different materials (pictured).
Today's A-Zdvent calendar features Rafael Viñoly and his Firstsite gallery wrapped in golden metal. New York architect Vinoly also made the headlines this summer after reports surfaced that his Walkie Talkie skyscraper in London was reflecting light intense enough to melt cars.
The next letter in our A-Zdvent calendar is U, for Dutch architecture firm UNStudio. Pictured is Galleria Centercity, a department store in South Korea, and the architects have also recently completed a shopping centre in China with over 42,000 shiny silver balls attached to its facade.
T is for Japanese architect Toyo Ito, whose Tama Art University Library is behind today's advent calendar window. Completed in 2007, the library comprises slender concrete arches that span lengths of up to 16 metres. Ito was also this year's Pritzker Prize laureate and his other projects include the Za Koenji Public Theatre in Tokyo.
Sou Fujimoto is the nineteenth architect to feature on our festive calendar. The Japanese architect, who claims to design structures "in between" architecture and nature, designed a cloud-like structure for this year's Serpentine Gallery Pavilion and previously completed a tiny wooden house built from a stack of chunky timber beams (pictured).
Famous for their collaboration on the iconic Pompidou Centre in Paris in 1977 (pictured), Richard Rogers and Renzo Piano both feature as the letter R in our A-Zdvent calendar of architects. Italian architect Piano recently completed an extension to Louis Khan's Kimbell Art Museum in Texas, while Rogers' London firm has just won a competition to design a new centre for social sciences at the London School of Economics.
There aren't many architects whose names begin with Q, so our seventeenth A-Zdvent calendar entry is Belgian artist Arne Quinze, who built this 20 metre-high installation in Germany in 2009. Other architectural structures by Quinze include The Sequence, a canopy of tree-like forms installed outside the Flemish Parliament in Brussels, Belgium.
P is for Peter Zumthor in today's A-Zdvent calendar window. The Swiss architect designed a Serpentine Gallery Pavilion in London in 2011, and was also responsible for the Brother Klaus Field Chapel in Germany (pictured) and a memorial to commemorate suspected witches in Norway.
Following our exclusive interview with architect Jacques Herzog of Herzog & de Meuron last week on the studio's recently completed Pérez Art Museum Miami, our new Pinterest board focuses on the Swiss firm. See our new Herzog & de Meuron Pinterest board »
Montreal designer Loïc Bard has created a wooden stool to add to his collection of furniture with gaping mouths that store magazines inside the top. More
Following our exclusive interview with Rem Koolhaas last month, Dutch office OMA is the fifteenth entry to our A-Zdvent calendar of architects. Koolhaas' firm recently completed De Rotterdam, a 44-storey group of interconnected glass towers in the architect's home city, and has also built two skyscrapers in China - the Shenzhen Stock Exchange (pictured) and the CCTV Headquarters building in Beijing.
N stands for late Brazilian architect Oscar Niemeyer in our fourteenth festive A-Zdvent calendar. This image by photographer Pedro Kok depicts the entrance to the Ibirapuera Auditorium in Sao Paulo, completed in 2005, while the architect's most famous projects include the National Congress of Brazil and the Cathedral of Brasília.
Dutch architect and MVRDV co-founder Winy Maas is the letter M in our daily A-Zdvent calendar. The firm's projects include the Balancing Barn (pictured), a house with a 15-metre cantilever, and a shop and office complex disguised as an old farmhouse, but which actually features walls made from glass.
Daniel Libeskind is the twelfth addition to our A-Zdvent calendar of architects. Pictured here is the New York architect's extension to the Dresden Museum of Military History, which features a pointed steel and glass shard through the skin of the historic museum, but he also recently unveiled plans to build an angular apartment block in Berlin.
Next up in our alphabet of architects is Kengo Kuma, the Japanese architect who has completed two contemporary art centres in France this year - the timber-clad art college and music school in Besançon and the FRAC arts centre in Marseille with a chequered glass facade (pictured).