The winners of an open international contest to remodel various venues on the Montjuc trade fair site in Barcelona have been revealedThe winning teams featuring Chilean-Croatian architect Smiljan Radi, local firm Forgas Architectes and Bjarke Ingels Group of Denmark have been announced by Spains Commission for the Centenary of the 1929 International Exposition.Launched last year, the two-stage competition sought proposals to transform the historic city centre site which hosted the International Expo of 1929 into a new modern, flexible and adaptable exhibition centre.The phased 255 million project planned to complete in time for the sites centenary in 2029 is divided into three lots.The first lot will see the existing Hall 1 also known as the Palau de les Comunicacions renovated and an emblematic new 20,500m multipurpose hall constructed on the site of the nearby Hall 4 and Palau de Congressos de Barcelona.This lot was won by a team featuring the architects Smiljan Radi, Miquel Marin Nez, Beatriz Borque and Cesar Rueda Bonet. Their winning proposal, 2029 Artefacto will create a luminous and monumental complex integrated into its surrounding urban environment.The project will include a new 2,000m landscaped walkway connecting the two pavilions together.The second lot will meanwhile see a new congress hall constructed on the site of the current Alfons XIII hall conserving its listed elements and delivering a new large-capacity auditorium.This contest was won by Forgas Architectes, Archambac (Arquitectura Sideral) and lvaro Alejandro Fernndez with the proposal Umbracle.The winning concept will create a large open-plan and flexible space that gives prominence to natural light and respects as much as possible the current structure designed by Josep Puig i Cadafalch.It will include a 6,670m courtyard garden, a 3,132m exhibition hall and a large 2,025-capacity auditorium along with several multipurpose meeting rooms. The self-sufficient proposal also features photovoltaic, aerothermal and geothermal systems and stormwater collection.The old Palau del Vestit which is now part of Hall 8 will also be transformed into an innovation hub focussing on smart cities, food, audiovisual and technology.This final lot was won by Bjarke Ingels Group and MIAS Architects. Their LAvantsala de la Fira concept will deliver a functional and flexible Z-shaped, three-storey building surrounded by garden open to the public.The proposal will combine the buildings existing structures designed by Josep Puig i Cadafalch and Josep Maria Jujol with modern interventions featuring flexible and connected workspaces, meeting rooms and a 200-person auditorium.All three lots represent the first phase of the sites regeneration. Each project is planned to complete by 2029 in time for the expos centenerary.A second phase to remodel both the Palacio de las Comunicaciones Hall 1 and the Palacio de la Metalurgia Hall 8 will see an additional architectural competition launched at a later date.