Slideshow: New York architect Steven Holl has concealed a underground gallery beneath a pool of water in Seoul, the city in South Korea that we've been focusing on following a string of proposals for skyscrapers. More »

Slideshow: OMA have created a stage set for an ancient outdoor theatre in Sicily that dates back to the fifth century BC. More »

Irish architects O’Donnell + Tuomey have extended a red brick warehouse in central London to provide a new home for The Photographers’ Gallery. More »

Architects OMA have unveiled plans to convert a former theatre in Upstate New York into a performance institute commissioned by Serbian artist Marina Abramovic. More »

Slideshow: Spanish architects Miquel Mariné Núñez and César Rueda Boné have transformed an abandoned market hall in Aragon into a children's centre with a slide connecting its floors. More »

Slideshow: Danish architects 3XN have completed a riverside cultural centre in Norway with glass hills outlined on its facade. More »

Paris firm Moussafir Architectes have blanketed the roof of this concert hall in Tours, France, with a synthetic material that looks like a quilt. More »

Movie: Rem Koolhaas was at the ICA in London this morning to launch OMA's design for the Garage Center for Contemporary Culture in Moscow. He gave Dezeen a quick introduction to the new gallery, which will be built in Gorky Park in the Russian capital for gallerist Dasha Zukhova. More »

In the second announcement from Rem Koolhaas' office today, OMA have unveiled their designs to convert a 5400 square metre 1960s pavilion in Stalinist-era Gorky Park in Moscow into a new venue for the Garage Centre for Contemporary Culture. Update: watch Rem Koolhaas give a quick introduction to the gallery in Dezeen's movie here. More »

Construction has started on an art museum with four overlapping peaks that Foster + Partners have designed for Datong, China. More »

New York architect Steven Holl has unveiled designs for a new institute for contemporary art at the Virginia Commonwealth University campus in Richmond. More »

London architects Grimshaw have completed the restoration of historic tea clipper the Cutty Sark, which reopened to the public today in Greenwich. More »

Overlapping walls of curving concrete encase this funeral chapel in Graz by Austrian architects Hofrichter-Ritter. More »

We love projects that involve castles. Windows are set within two-metre-deep recesses in the stone walls of this castle visitor centre in southwest Germany by Swiss architect Max Dudler. More »