His piece “Sentences on Conceptual Art” is published in issue 5 of 0 to 9 magazine; it becomes one of the most widely cited artists' writings of the 1960s, exploring the relationship between art, practice and art criticism.
late 1960s
Teaches at New York schools
In the late 1960s he teaches at several New York schools, including New York University and the School of Visual Arts.
1968
A drawing for the opening of the Paula Cooper Gallery
He creates a work for the inaugural show of the Paula Cooper Gallery, an exhibition to benefit the Student Mobilization Committee to End the War in Vietnam; since then thousands of his drawings have been installed directly on walls.
27 juin 1968 – 6 octobre 1968
Exhibition: 4. documenta
1969
“When Attitude Becomes Form” in Bern
Harald Szeemann invites him to take part in “When Attitude Becomes Form” at the Kunsthalle Bern, Switzerland.
1970
First retrospective in The Hague
The Gemeentemuseum in The Hague presents his first retrospective exhibition.
