Onkaram Ashram was established in 1960 at Mayiladuthurai
in Nagapattinam District
, Tamil Nadu
by Sri Siddhar Swamigal. It was later transferred to the Kamatchi Amman Koil Street in Pondicherry
. Onkaram Ashram offers spiritual lessons. On every full moon day mass meditation is conducted. Other activities include training in spiritual practices, propagation of the principle of truth and justice among mankind, and publishing of books on spiritual subjects.