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MONA Opens Phrontisterion, a A$100m Subterranean Library

Proprietary software maps relationships among tens of thousands of rare items in a reference-only wing included with museum admission.

Overview

  • Phrontisterion opened on Sunday, June 21, 2026, beneath MONA’s Elektra amphitheatre after four years of excavation and construction that removed about 20,000 cubic metres of rock and soil and cost just north of A$100 million.
  • The collection brings together items from David Walsh’s private trove and is reported at between roughly 30,000 and 50,000 books, maps and documents, including a 1623 First Folio, first editions and handwritten papers by figures such as David Bowie and Albert Einstein.
  • MONA rejected traditional Dewey Decimal ordering and deployed a proprietary system developed with Art Processors that uses an 'O' app, re-photographing, digital doubles and illuminated 'live bays' to locate items and surface thematic links.
  • The new wing is designed as a staged reference library rather than a lending library, with thematic shelving, a 40-metre sandstone tunnel, hidden rooms and integrated artworks that invite on-site browsing, study and staged encounters with objects.
  • The project is privately funded by Walsh’s fortune and expands MONA’s display space, a move that showcases the museum’s curatorial ambition while following reporting of large cumulative operating losses and likely shaping debates about privately financed cultural expansion.