The following sequence is related to the artistic production executed from 1990 to 2018.

"From this multi-faceted fantasy stem the previous cycles of the work of Leonardo Pierro, an artist highly critical of a certain scientific positivism.

After the mythology of the Chironi (1999/2001) seized by numbness, thoroughly analyzed in the texts of Dario Salani and Olga Gambari, there are the circular works (2001-2007) triggered by an interpretation of Pop Art, which, as Arthur Danto theorized, in the light of Andy Warhol's work, introduced the chiasma whereby a common object of popular culture, like a bottle of Coca Cola, becomes a work of art and an elite work of art becomes a commodity for mass consumption. Following this, The Cure (2005/2006), a pictorial cycle with references to medieval culture , on the theme of pharmacology and chemistry as a refuge to exorcise physical and psychological pain.

Allaroundtheworld (2006/2008) is a sequence in which Blog Art is practised as an instrument of democratization of the message that it may be possible to discover events that have been censored or hidden by instruments of power; the following Ecology for Dummies (2008/2009) consists of common objects in pinewood cases, which conceptually refer to the limits of knowledge and political and sociological themes, followed by the Sweet Decadence cycle (2009/2010) focusing on a short-circuit arrangement of images now seen as too few , now too many: a metaphor for the psychogenic disturbances of anorexia and bulimia.

The End is the Beginning (2010) adopts the iconography of the Vanitas of the seventeenth-century Still Life as a metaphor for the precariousness of existence, immediately preceding the cycle that is the subject of the last exhibition entitled "Extra Life" (2011/2012)." Viana Conti