Previoulsy unpublished photographs document an opening at Internationale Galerij OREZ, The Hague. The photographs are unmarked but were most likely taken at Schoonhoven's solo presentation at the gallery, 20 February-19 March 1971.
Many of such openings had live jazz performances. Anita Schoonhoven was a connoisseur and indefatigable promotor of jazz - we see her in the top image, far left.
Anita Schoonhoven began organizing jazz concerts in the mid-1960s, for which she succeeded in bringing international renowned musicians to the Netherlands. Jan Schoonhoven supported these concerts financially, as well as making awards - in the form of reliefs - for the annual Smør-djes Festival in Delft, an event also initiated by Anita Schoonhoven.
Selected exhibitions at Internationale Galerij OREZ, The Hague
'Decemberexpositie' (group) , 3–31 December 1960
'Sculpturen en Plastieken' (group), 15 December 1961–15 January 1962
'Nieuwe Tendenzen' (group), 18 January–10 February 1962
'Jan Schoonhoven' (solo), 13 March–15 April 1966 (parallel to a solo presentation of Armando)
'Jan Schoonhoven' (solo), 3 November–15 December 1967 (parallel to a solo presentation of Yayoi Kusama)
'Jan Schoonhoven' (solo), 4–23 April 1970
'Jan Schoonhoven' (solo), 20 February–19 March 1971 (parallel to a solo presentation of Nanda Vigo)
'Galerie m in Holland' (group), 5 November–21 December 1971
'Jan Schoonhoven' (solo), Galerie OREZ mobiel, 28 August–26 September 1981
'Tekenen' (solo) Galerie OREZ mobiel, 15 January–30 March 1990