1- Exhibition Catholic University of Leuven 2011

2- Exhibition Ostend 2013

3- Exhibition Orroir (Mont de l’Enclus) 2014

4- Introduction by André Posman on the exhibition of Etienne Loyson at Tielt,
Gallery “Carpe Diem” – 17-11-2017

5- “20-350” twenty years of art in Sahaja Yoga – 6/19/2019

6- Letter from André to Etienne, after showing the movie
“Etienne Loyson Artista” – 16-5-2021