Complex sentence: The temple is revered by the Tamil Saiva canonical work of the 7th century, the "Tevaram", by Tamil saint poets called the nayanars, and is classified as a "Paadal Petra Sthalam"--one of the temples revered in "Tevaram".
Split into simpler sentences: The temple is revered in the 7th century Tamil Saiva canonical work the "Tevaram", written by Tamil saints and poets known as the nayanars. It is also classified as a "Paadal Petra Sthalam", one of the temples revered in "Tevaram".