Design story

IJhorst: a little stool with a visible structure

A small stool can carry a surprisingly clear structural idea. IJhorst puts a circular top above an open arrangement of thin steel members, leaving room to see through the base. Constant Nieuwenhuys makes the support part of what gives the object its presence.

Bright circular top above a very open angular wire-like support in a contemporary colour study.
PatinaHall editorial reconstruction. It is not a documentary photograph. A small circular top and open geometric base give support a visible pattern.
On this page
Key facts & takeaways

At a glance

Subject
IJhorst stool
Entry
Design story
Last reviewed
26 October 2026
Designed
1953documented

Three things to remember

  1. The top and the open geometric base have visibly different roles.
  2. The small version can serve as stool or side table.
  3. Recent colours should not be mistaken for an exact 1953 finish.

Start underneath the circle

A small round top is an easy shape to understand. IJhorst becomes more particular when the eye moves beneath it, following thin members through an open geometric base.

Spectrum dates the design to 1953 and credits Constant Nieuwenhuys. It describes a wire-steel frame and a plywood top, with a 35 cm diameter and 43 cm height for the small stool. The same piece can also function as a side table.1

The scale makes the relationship especially readable. The top supplies a single clear plane, while the base occupies space through lines. Much of the surrounding room remains visible between them.

The diagonals make the base worth following

Spectrum discusses the frame through compressive and tensile forces. That is its account of the design’s structural expression, rather than an invitation to infer a tested load from an illustration.1

Visually, the diagonal members give the eye several routes between the underside of the top and the floor. The open structure makes those routes easier to follow than they would be inside a solid pedestal.

The contrast changes how the small object reads. The circle seems compact and complete, while the supporting lines appear to reach through the space beneath it. A useful piece of furniture can therefore also act as a small geometric composition.

A generic circular top and diagonal wire members make a structural reading visible.
A generic circular top and diagonal wire members make a structural reading visible. Original PatinaHall schematic, not to scale.

A painter works with a furniture collection

Stichting Constant’s account connects the 1953 IJhorst tables to Martin Visser’s invitation to make designs for the Spectrum collection. It places the furniture within a relationship between an artist and a design company, rather than treating the stool as an isolated decorative object.2

Spectrum also connects IJhorst with a turning point between Constant’s Cobra period and his later New Babylon project. The small piece gives that larger shift a domestic scale: a person can encounter the geometric thinking in an everyday object.1

The furniture does not need to explain the artist’s entire practice. Its open base is enough to make a particular way of organising space tangible.

The colours have another date

The foundation dates Spectrum’s commission to Studio RENS for a new colour scheme to 2022. The manufacturer’s later accessories presentation describes the reintroduction in its collection. Those choices belong to a later chapter, not automatically to the original 1953 version.23

Colour can draw attention to the separation between top and frame, but the relationship already has a physical clarity of its own. A small circle sits above a structure one can look through. IJhorst gives the room a place for a person or a cup and a few lines worth following.

Research notesEvidence, connections and limits

This is a design history using Spectrum and Stichting Constant records. The 1953 designs, 2022 colour commission and later accessories presentation remain distinct; the diagram is not a measured frame or load calculation.

Evidence map

Connected subjects and evidence

Reviewed facts

  • Designed 1953documented

    Spectrum and Stichting Constant connect IJhorst to Constant Nieuwenhuys’s 1953 designs. The foundation separately dates the new Studio RENS colour commission to 2022, while Spectrum’s accessories announcement records the later presentation. The later colour presentation is not an original 1953 finish.

    Reviewed 26 October 2026 by PatinaHall editorial.
    • Source 1Work or object record and accompanying maker account: IJhorst stool. IJhorst stool
    • Source 2Foundation product account: 1953 table designs and 2022 Studio RENS colour commission; 35 cm diameter/43 cm height
    • Source 3Spectrum Accessories Collection announcement: later Studio RENS colours for IJhorst and Benno mirror; no precise publication year asserted

Reviewed connections

  • IJhorst stooldesigned byConstant Nieuwenhuysdocumented

    Spectrum and Stichting Constant credit Constant Nieuwenhuys with IJhorst. The sources distinguish the original table designs from the small stool/side-table presentation and later colours. This is a design history, not an exact museum-object record.

    Reviewed 26 October 2026 by PatinaHall editorial.
    • Source 1Work or object record and accompanying maker account: IJhorst stool. IJhorst stool
    • Source 2Foundation product account: 1953 table designs and 2022 Studio RENS colour commission; 35 cm diameter/43 cm height
  • IJhorst stooluses techniqueGeometric wire-frame construction in IJhorstdocumented

    Spectrum describes a geometric base of thin wire steel with a plywood top and discusses its tension-and-compression reading. The design’s association with the Spectrum collection does not identify an exact physical factory or fabricator.

    Reviewed 26 October 2026 by PatinaHall editorial.
    • Source 1Work or object record and accompanying maker account: IJhorst stool. IJhorst stool

Research trail

Sources and further reading

  1. IJhorst stoolSpectrumAccessed 26 October 2026
  2. IJhorst Stool / Side TableStichting Constant / Constant1 0 1Accessed 26 October 2026
  3. Spectrum Accessories CollectionSpectrumAccessed 26 October 2026

Last reviewed 26 October 2026. Found an error or a stronger primary source? Contact PatinaHall.