The Calyx, a new landmark for Sydney
PTW Architects in collaboration with landscape architects McGregor Coxall and Cockram Constructions is proud to be involved in the design and delivery of this project. The PTW team involved in bringing The Calyx to life included Troy Uleman, Neil Hill, Glen Harper, Rod Brown, John Shipp, Sara Best and Rebecca Quin. The Calyx (pron. kal-iks, def. ‘The outermost whorl of flowers’), a leading horticultural display, research and education centre for the Royal Botanic Garden Sydney formed the special centerpiece of the Garden’s 200th birthday initiatives last month. Coined ‘a jewel in the Garden’ for its elevated position and sense of arrival, The Calyx is envisioned as an iconic but serene addition to the Gardens as a whole. The key element of the building is the new ‘Iris’. This circular steel structure is the most highly visible part of the building from afar and contains the foyer, education and retail space that can be turned into event spaces at night with retractable walls that allow the exhibition and event space to be combined. Won by a Design Competition, PTW worked with Cockram Construction and McGregor Coxall to design this highly flexible building that will showcase ever-changing exhibitions. The team used the existing elements of the Arc, originally designed and constructed in 1994 by renowned Australian Architect, Ken Woolley, whilst retaining the extraordinary design quality, integrity and innovation of the existing structure. For more project information and media coverage: and