World Art Utopia

Tree of Knowledge Memorial — Barcaldine

The preserved white trunk of the Tree of Knowledge stands under a giant cube of hanging timber battens that recreates its lost canopy on the main street of Barcaldine
Artwork FileBarcaldine, Australia

Tree of Knowledge Memorial

StandingMar 2026

m3architecture and Brian Hooper Architect · 2009 · Barcaldine, Queensland, Australia

Photo: Joshua Ryan / Wikimedia Commons (CC0), as published in Street Art Utopia; full photo.

The Tree of Knowledge Memorial in Barcaldine, Queensland, designed by m3architecture with Brian Hooper Architect, was officially opened on 2 May 2009. It shelters the preserved remains of the ghost gum under which striking shearers met in 1891, a tree poisoned in 2006. About 3,600 hanging timber slats inside an 18-metre-high structure trace the shape of the old tree's canopy. Since March 2026 Barcaldine Regional Council has limited public access while structural assessment and planning works are carried out. Source Source Source Checked

Standing Mar 2026: on 10 March 2026 Barcaldine Regional Council limited public access to the memorial for structural assessment and planning works; its FAQ says the tree is not damaged and no reopening date is set. Source Source Checked

More photos

The white preserved trunk and branches of the Tree of Knowledge under the hanging timber canopy, seen from the side with the street behind, Barcaldine, March 2013
2013 Canopy and trunk seen from the sidePhoto: Mark Marathon / Wikimedia Commons (CC BY-SA 3.0)
View from below of the preserved trunk and branches of the Tree of Knowledge under thousands of hanging timber battens, Barcaldine, June 2015
2015 Looking up into the hanging timbersPhoto: Vic Bushing / Wikimedia Commons (CC BY-SA 4.0)

💡 4 things to know

  1. A canopy rebuilt from old photosThe architects worked from century-old photographs to make a 3-D digital model of the tree, then shaped its leafy canopy as a void among hanging timbers. Source Reported
  2. A mourning veilIn the architects' statement published by Dezeen, m3architecture’s Michael Lavery says the charcoaled outer timbers form a veil referencing a place of memory and mourning. Source Reported
  3. The tree itself is still thereThe relic tree's root ball and branches were kept; the root ball is shown to visitors through a glass floor panel under the canopy. Source Checked
  4. Access limited in 2026In March 2026 the council limited access to the structure for structural assessment. Its FAQ says the tree is not damaged and no reopening date is set. Source Checked

📍 Where it is

Oak Street, in front of the railway station, Barcaldine, Queensland Source Checked

Open in Maps

Opens a map at -23.5523, 145.2897.

🗓️ Sightings

  1. 20092 May

    Memorial officially opened in Barcaldine · Wikipedia

  2. 200913 Nov

    Featured by Dezeen

  3. 201319 Mar

    Photo of the memorial by Mark Marathon

  4. 20154 Jun

    Photo of the memorial by Vic Bushing

  5. 201918 Mar

    Described by Outback Magazine

  6. 202029 Sep

    Photo of the memorial by Joshua Ryan

  7. 202610 Mar

    Council limits public access for structural assessment

Green stamps mark dated photographs (the date given on the photo’s page); amber stamps mark records, events and reports. Publication dates are not photo dates.

🗞️ In the sources

Dezeen13 November 2009

Memorial for Tree of Knowledge by m3architecture and Brian Hooper

“Australian architects m3architecture and Brian Hooper Architect have completed a memorial to a tree in Queensland, Australia.”

Read the source →

Interior Design1 February 2010

All Politics is Local: Brian Hooper Architect and M3Architecture Breathe New Life Into The Tree Of Knowledge

“The architects used a blowtorch to char the timbers to a shade of gray that symbolizes the sobriety of the project.”

Read the source →

✅ The facts

Architects
m3architecture with Brian Hooper Architect Source Checked
Opened
2 May 2009 Source Checked
Height
18 metres Source Checked
Suspended timbers
3,600 hanging timber slats Source Checked
Timber source
According to Interior Design, milled from old telegraph poles and charred with a blowtorch Source Reported
Cost
About A$5M (Wikipedia); £3 million (architects' release on Dezeen); $6 million (Outback Magazine, 2019) Source Conflicting
Award
2010 Lachlan Macquarie Award for Heritage Architecture (Australian Institute of Architects) Source Checked
Location
Oak Street, in front of Barcaldine railway station Source Checked
Status
Standing; public access limited since March 2026 during structural assessment, no reopening date set Source Checked

🔗 Related

All sources & image credits

Last checked: 11 November 2026 · How we verify art