His early works, under the tutelage of the Spanish painter Anglada Camarasa, were stylistically close to impressionism. Around 1910, influenced both by cubism and by futurism, he became one of the first modern Portuguese painters. His style is aggressive and vivid both in form and colour and his works may seem random or chaotic in their compositional structure at first sight but are clearly defined and balanced. His more innovative paintings, such as "Trou de la Serrure", resemble collages and seem to pave the way to abstractionism or even dadaism.
In 1925, a retrospective exhibition in France of the painter’s artwork was well received by the public and critics. Ten years later in Portugal, an award was created to distinguish modern painters: the Souza-Cardoso prize.Wikipedia