David Adjaye and Zaha Hadid are battling it out to design a new arts museum in Perm, Russia.
The two British architects are part of a 25-strong shortlist vying to build the first museum in Russia that will 'meet 21st-century needs'.
The scheme will look to improve on the existing Perm State Art Gallery - which celebrates its 85th anniversary this year - while the city, at the foot of the Ural Mountains, tries to increase its cultural status.
More than 320 expressions of interest were received, from which 25 were chosen, and according to the competition organisers, the museum will 'shape the city - serving as a calling card for the city and its region in the manner of Frank Gehry's Guggenheim in Bilbao'.
It will be the first time Adjaye and Hadid have gone head-to-head since the pair competed for the Stirling Prize last year, only to be beaten by Richard Rogers' Barajas Airport.
Participants will now be asked to produce concept designs for the museum by November 10, and a judging panel will decide the winner by December 6.by Richard Vaughan