The City of Paris has called upon the architects of the world to propose "innovative urban projects" to reimagine the city's urban future. As the first competition of its kind in the world, Mayor Anne Hidalgo and her Deputy, Jean-Louis Missika, will "select and implement the new forms of buildings that will shape the future of Paris," putting innovation at the top of the criteria. Offering 23 sites, located in the centre of Paris and on the peripheries, the City is convinced that "the challenges faced by the world can be addressed through local answers." According to the Mayor, "from today, world creators are given carte blanche to reinvent the ways of living, working and trading in Paris." "Surprise us!"

An international jury behind Budapest’s new National Gallery has launched a second and invited competition for a select few of the industry’s best after the first, open competition lead to “disappointing” results. Jean Nouvel, David Chipperfield, Mecanoo, Nieto Sobejano, Renzo Piano, SANAA and Snøhetta have been asked to submit proposals for a 5-building museum complex on the edge of Városliget, one of the city’s main parks. It will house the new National Gallery, the Ludwig Museum, an ethnography museum, architecture museum and photography museum.

The Architectural League and Socrates Sculpture Park invite emerging architects and designers to submit proposals for Folly, an annual design/build studio program during March and April 2015 leading to a public exhibition at Socrates opening in early May 2015.

The City of Kyiv has launched an international design competition aiming to commemorate the lives lost in Ukraine's Maidan Revolution, both through a memorial to their memory and through implementing the ideals of the revolution in the urban space surrounding Maidan Nezalezhnosti. The competition, honed through months of public discussions and consultations, is being organized by the Kyiv City State Administration and Ukraine's Ministry of Culture. More details after the break.

Three finalists have been selected to move forward in the Van Alen Institute (VAI) and New Orleans Redevelopment Authority’s (NORA) “Future Ground” open ideas competition. Each will be provided with a $15,000 stipend to investigate and develop long-term design and policy strategies for vacant land reuse in New Orleans.

Kum & Go has enlisted six internationally renowned practices to compete for design of its new $92 million headquarters planned for Des Moines, Iowa: Bjarke Ingels Group (BIG), Bohlin Cywinski Jackson, Morphosis, Renzo Piano Building Workshop, Safdie Architects, and Skidmore, Owings & Merrill LLP (SOM). The 24-hour convenience store chain plans to select an architect by mid-November. The 120,000-square-foot corporate office will be built on the north side of the Pappajohn Sculpture Park, between 14th and 15th streets.

Villeroy & Boch have kicked off their first North American Designer Bathroom Challenge, inviting architects and licensed designers to develop a concept for a contemporary and multisensory bathroom design for the chance to win a trip to Germany.

The Royal Institute of British Architects have announced an international design competition to regenerate Centenary Square, one of Birmingham's largest public spaces, and neighbor to Birmingham's International Convention Centre, the Old Rep Theatre, and the the Library of Birmingham by Mecanoo which was shortlisted for the 2014 Stirling Prize.

The competition for the new Guggenheim Museum in Helsinki closed last month, becoming the most popular architectural competition in history with 1,715 entries. Now, competition organizers Malcolm Reading Consultants have made every single one available to view online, with each anonymous proposal presented in a series of two images, and a short description fro the architects. "Since its inception, this competition has been organized to be welcoming, inclusive, and transparent, and the gallery presents a singular opportunity for the public to explore and consider the broad expanse of entries," says Richard Armstrong, Director of the Solomon R. Guggenheim Museum and Foundation.

UK architects OS31 have recently won a competition to design RAW:almond, “the first ever outdoor dining restaurant on a frozen body of water.” The temporary restaurant has set up for business in Winnipeg, Manitoba, Canada for the last two years, and for 2015 the organizers held an international open competition for the winning design. This year’s design establishes itself as an expressive frame that appears to float across the ice like a frozen jetty. Learn more about the winning proposal after the break.

Combo Competitions' latest ideas challenge, entitled Hello Nature!, centres on a site located in northern Sweden at the foot of a mountain (Omneberget), sat within an area called the High Coast (Höga Kusten) - which is also a UNESCO World Heritage Site. This competition is looking for "structures that celebrate nature", which also involve elements of "both education and recreation, or - if you prefer - business and pleasure." The wider question the competition poses is whether or not architecture can encourage involvement with nature. Previous Combo Competitions have included the London Cinema Challenge and Faith! A Place of Worship in London, both of which attracted a number of high quality proposals.

The Pärnu Municipal Government (in West-Estonia) announces an open architectural competition for the Rail Baltic Pärnu passenger terminal.

The OISTAT Theatre Architecture Competition is an international ideas competition, aimed at students and emerging practitioners, which is organized every four years by the Architecture Commission of OISTAT (International Organization of Scenographers, Technicians and Theatre Architects). The theme of the 2015 competition will be the design of a floating theatre to be moored at a particular location on the river Spree in Berlin, Germany, but capable of being moved to other sites on the river.

Among the changes in material technology that are constantly altering the architectural landscape, one of the most popular - and most dramatic - is the idea of the timber skyscraper. And with vocal advocates like Benton Johnson of SOM and Michael Green leading the discussion with projects like the Timber Tower Research Project, the wooden highrise is on the verge of becoming a mainstream approach.

The competition jury for Washington D.C.'s 11th Street Bridge Park has unanimously selected OMA + OLIN's design to turn the ageing freeway structure over the Anacostia River into an elevated park and new civic space for the city. With their dynamic intersecting structure, OMA + OLIN saw off competition from three other teams composed of: Wallace Roberts & Todd (WRT), NEXT Architects and Magnusson Klemencic Associates; Stoss Landscape Urbanism and Höweler + Yoon Architecture; and Balmori Associates and Cooper, Robertson & Partners.

The city of Helsinki has announced plans for a design and build competition for a new commercial and residential district in Pasila, near the city centre. The competition, which calls for 8-10 buildings of 15 stories or more, will be part of the city's drive to make Pasila the "second centre of Helsinki," with a total of 150,000-200,000 square metres of residential and office space planned for the district. Read on after the break to find out more about the competition.

After the record breaking success of Fairy Tales 2014, with over 300 entries from 50 different countries, Blank Space is excited to announce that the second edition of the competition is now open for registration. The Fairy Tales competition invites architects, designers, writers, artists, engineers, illustrators, students and creatives to submit their own unique architectural fairy tales. The scale, location, and program of the submission is up to each entrant. A successful entry crafts a text narrative, along with 5 images, in the most spectacular way possible.

In partnership with La Sapienza University, Progetto Forti and Rome municipality, Young Architects Competitions (YAC) is launching a competition to redesign one of the treasures of Rome: Forte Portuense.