Passage from the Essay by Ernest Van Buynder;

BRUSSELS Van Hoeydoncks short geometric abstract period commences around
1955 with art movements such as "ArtAbstrait","Formes" and "Art Construct". In 1957 he produces his first monochrome collages with slices glued and over painted on the canvas. In 1956,1957 and 1959 the Gallery Saint-Laurent shows his reliefs, drawings and paintings, followed by one man shows in the Palais de Beaux-Arts with "plexi-reliefs with light work" and "cities of the future". He abandons the flat surface and starts the dematerialization of his work by manipulating light and shadow. In 1961 he shows his "Bonhommes et monocles de PVH – peintre du ciel" in the P. Vanderborght gallery together with the publishing of a manifest by the important art critic Jan Walraevens.
In 1965 he is selected by Jean Dypréau and Pierre Restany to join the famous "Pop Art, Nieuw Realisme" show at the Palais des Beaux-Arts. ANTWERP By the end of the fifties,Antwerp is a centre of literature, theater, jazz and art. PVH joins the group "Formes" at the "Accent" Gallery. A number of Antwerp artists create "G58-Hessenhuis" and for a short time Antwerp will be the centre of contemporary art in Belgium. With Paul Ausloos (photographer) and Jozef Peeters and Georges Vantongerloo (abstract artists) PVH joins a G-58 show at the Middelheim Castle.

Between 1958 and 1962 works by PVH are exposed several times at the
Hessenhuis.As a co-founder he participates at the first G-58 group show in
November 1958 with Vic Gentils, Pol Mara and Dan Van Severer, and he is selected for the "Prijs Jorge belgische Schilderkunst" in 1958. March 1959 is the start of the important international exhibition "Vision in Motion – Motion in Vision". PVH is a co organizer and exposes with Robert Breer, Pol Bury,Yves Klein, Heinz Mack, Enzo Mari, Bruno Munari, Otto Piene, Dieter Rot, Jesus Raphael Soto, Daniel Spoerri and Jean Tinguely.The same year, PVH creates his first monochrome reliefs with plexi. In October 1959 PVH has a one man show at the Hessenhuis. PVH becomes friends with Georges Vantongerloo. In November 1959 he participates at the "Tweede Groepstentoonstelling G58 –Hessenhuis" with the same artists and the young Camiel Van Breedam. In March 1960 he is reselected for the "Prijs Jorge Belgische Schilderkunst 1959" and receives a nomination with Bert De Leeuw and Walter Vanermen.