Officially Arni, otherwise spelled Arani, also known as Periya arani is a major commercial, Industrial and Cultural hub and also a divisional headquarter in Tiruvanamalai district of Tamil Nadu, India. The town is the second largest urban center only next to the district headquarters, Tiruvannamalai and administered by a selection grade municipality. Arni is home to silk weaving, spinning mills and agricultural industries. Famous Arni silk and a paddy variety named Arni Ponni, known for its rich aroma originates at Arni. The town is often nicknamed as The Silk City. Arni also has a rich cultural heritage - a major center of Tamil Jainism.