Madrasatu l-'Arūsiyyah - the oldest Arabic institution in Tamil Nadu, India.
It was established in 1082 AH/1671 AD by the venerated Muslim savant and saint of the Arwi region (modern-day South India and Sri Lanka), Shaikh Ṣadaqatullāh b.
Madrasatu l-'Arūsiyyah | Arusiyyah Madrasah |