Curated by Melania Rossi at Alessandro Casciaro Gallery in Bolzano, In Abstracto (2015) placed Thomas Canto among historical and contemporary abstract artists. He exhibited alongside Heinz Mack and Otto Piene, co-founders of the ZERO group, as well as Afro, Giulio Turcato and Hermann Nitsch, and contemporary painters including Alberto Di Fabio and Sten & Lex.
The selection set his geometric work in dialogue with a history his practice draws on, from early Constructivism to the Optical Art of the 1960s.