María Antonia Siza died in Porto in 1973, at just forty-three years old. Shortly before, in 1970, the first and only exhibition of her drawings and watercolors, created during her lifetime, took place. catalog It includes the exhibition that he made el Círculo de Bellas Artes in 2002 about the artist.
The exhibition consists of a series of ink drawings and watercolors that constitute a representative model of his artistic evolution: from his pen-and-ink works to his more expressionistic watercolors, made with bold strokes and in which the angled and suspicious faces that look at us askance predominate.