[2] In the early 1960s he created an abstract painting that was subsequently defamed as Western and decadent and excluded from all exhibitions.

[3] It was not until 1968, during the Prague Spring, that the exhibition "5 young artists" (Bertalan, Cotosman, Flondor, Molnar and Sayler) in Galeria Kalinderu in Bucharest showed abstract-constructive art in Romania for the first time.

The "konkret" exhibition series in Nuremberg (1980 to 1990), which Sayler directed, received international acclaim.

Around 100 artists took part, including Dan Flavin, Ellsworth Kelly, Kenneth Martin, Vera Molnár, François Morellet, Aurélie Nemours, Mario Nigro, Leon Polk Smith and Jesús Rafael Soto.

[5] Alongside the exhibitions of paintings, prints, sculpture and photography, a series of site-specific installations was also held, in Galerie Grare, Paris; Palazzo Ducale, Genoa; East West Gallery, New York; St. Peter's, Cambridge; Gallery A, London; Ely Cathedral, Ely; University Gallery, Plzeň, Czech Republic; MUWA, Graz, Austria; Museo CAMEC, La Spezia, Italy.

[6] Sayler arrived at Concrete art by opposing political reality and the doctrine of socialist realism.

[9] The late 1990s saw the creation of wall pieces or ‘Bodies’ and Engrams (‘Norigrammes’) as site-specific installations in the urban architecture.