W* talk to architect Eduardo Souto de Moura

Eduardo Souto de Moura is one of the most revered architects working today. From his base in Porto he has been at the vanguard of modern Portuguese architecture, combining practice with teaching around Europe.

In the 1970s he worked under Alvaro Siza and the two continued to collaborate, most recently on the 2005 Serpentine Pavilion. His work represents the ultimate abstraction of modernist forms, motivated by the strong local light and temperate climate, and traditional building methods like white rendered walls. Great precision is combined with rough, textural materials to create timeless works that seem unconcerned with the relentless visual novelty of the age.

Recent projects include the Casas das Historias and the Braga Stadium. We recently caught up with the architect and spoke to him about two new projects, the Bom Sucesso development in Obidos, on Portugal's 'Silver Coast', and the conversion of a former convent in the Algarve into apartments.

The Bom Sucesso development has emerged slowly out of the mud but is now largely complete, with an array of new villas by architects including Manuel Aires Mateus, Nuno Graca Moura, Rui Passos, Josep Llinas, David Chipperfield, Alvaro Siza and of course Souta de Moura himself.

The architect's townhouses and villas are low-lying and simple, holiday villas that rise up from the manicured landscape as a series of geometrically precise forms. Portuguese architecture was once dubbed 'critical regionalism' by the architecture critic Kenneth Frampton, who interpreted it as being unique culturally specific. 'I don't agree with Frampton,' says Souto Moura, 'I prefer the term critical internationalism. Good education, culture and refinement can be exported anywhere. It's not culturally specific.'

The Convento das Bernadas presented a different kind of challenge. 'There was no programme,' the architect explains, 'no cultural component or hotel, just a place for living.' The splendid structure dates back to around 1500, and served time as a factory after its time as a monastery. Souto de Moura's plan involves the creation of 78 three-storey houses into the existing fabric and a 'street' of single-storey houses arranged like a wall around the base of the original building.

Above all, his intervention is bold but respectful, a modernity that addresses modern modes of living without compromising the character and quality of the original building. 'I always like to return to the earth. The house is one of the most conservative institutions we have in history. Mies van der Rohe once said that he was building in a 'new Sumerian style' - materials and construction may change but for thousands of years the forms have not changed.'