Hall of Wisdom:translit=Cattiya ñāṉa capai) is a temple constructed on 25 January 1872 by the saint Sri Raamalinga Swaamigal also known as Vallalaar in the town of Vadalur in Cuddalore district,[1][2] Tamil Nadu, India.

It is an octagonal structure; the sanctum sanctorum of this temple is concealed from the main hall by seven curtains which are parted only on the Thai Poosam day.

All Saivite madams are primarily for religious pupils, to which common people only go when a need arises.

Vallalar mentioned in a poetry as given below: எச்சபை பொதுவென இயம்பினர் அறிஞர்கள் அச்சபை யிடங்கொள்ளும் அருட்பெருஞ் ஜோதி Near the Sathya gnana sabha there is the Dharma saalai where free food is offered to thousands of people every day.

The Dharma saalai has a stove which was lighted by Sri Raamalinga swaamigal (Vallalar), which is still being used for cooking.