Taş Mektep | Novos Architecture Studio, in Büyükada, Istanbul, Turkey, was designed by Novos Architecture Studio and completed in 2023. It is one of the wider set of Turkish architecture projects we have been cataloguing for what they reveal about real-world stone specification. To be clear: this is not a DIJA project, and we did not supply the material — it is included here purely as a documented reference.
Public documentation for this particular project does not break down the stone specification by room or surface — which happens more often than you would think, even for well-photographed buildings.
For bilecik, söğüt stone, as a general (not a documented) suggestion, something in the spirit of this build would be Breccia Oniciata.
The original project write-up, with full photography and credits, is linked below — we do not reproduce it here, only the facts.