Answer

Sri Lanka is known more for its historical Jain traces than for surviving active Jain temples today. In Jain-related scholarship, the main site discussed is Anuradhapura, especially Vessagiri, where some inscriptions have been compared with Jain epigraphy, though this identification is not universally accepted. ( repository.kln.ac.lk)

Explanation

The Jain presence in Sri Lanka is usually described through ancient literary references and archaeology rather than through a large surviving temple tradition. Some sources also mention a Jain temple at Trikutagiri in historical tradition, but this is not the same as a clearly preserved Jain temple complex that remains in regular worship today. ( repository.kln.ac.lk)

Spiritual Understanding

This shows how Jain Dharma once had a reach beyond the Indian mainland and left historical footprints in Sri Lanka, even if the living temple tradition there did not continue strongly over time. ( repository.kln.ac.lk)

Takeaway

If you mean present-day Jain temples, Sri Lanka is not known for a prominent surviving Jain temple network. If you mean historical Jain sites, Vessagiri/Anuradhapura is the most commonly discussed place in Jain-related studies. ( researchgate.net)