Siddhasila (also called Siddhashila) is the realm of the liberated souls in Jain cosmology. After a soul attains moksha (self‑realization and removal of all karma), it resides in this pure, eternal realm. Key points:

• It is the abode of all siddhas (liberated souls).
• The souls there are free from any karma, time, or physical constraints, and they live in infinite bliss and perfect knowledge.
• It is described as a realm located beyond the cycle of birth and death, a completed, eternal state.
• Both Digambar and Shwetambar traditions affirm the basic idea, though there may be differences in minor details of cosmology and description.

If you’d like, I can share the traditional description in the sutras or stotras that refer to Siddhashila, along with an arth (meaning) from authentic Jain sources.