The retrospective exhibition of Stanisław Witkiewicz, also known as Witkacy, which opened at Zachęta on 9 October 1967, featured 130 works by the artist, including 97 paintings and 33 drawings. Among the presented paintings, only 9 oil canvasses were showed alongside 88 pastel works.

The author of the concept for the Contemporary Trends. Paintings from the Collections of the Stedelijk Museum in Amsterdam and the Stedelijk van Abbemuseum in Eindhoven exhibition, and its initiator, was Edy de Wilde (1919–2005). The opinions of this charismatic museologist left their mark on the character of the whole exhibition. De Wilde was the director of the Van Abbemuseum in Eindhoven (1946–1963) and then of the Stedelijk Museum in Amsterdam (1963–1985). Therefore, he presented works which he mostly bought for the museum collections himself.