Sometimes part of a design process, sometimes comissions, sometimes self initiated, these drawings, mostly vectorial, are achieving a certain autonomy within my work as illustrations for articles in magazines (as in Jornal Arquitectos, Friendly Fire or arqa) or part of architecture exhibitions. 
Here are some examples:

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Mobirise
kern-kern
Mobirise
Praça de espanha
Mobirise
Aleixo
Mobirise
Columnas