Panguni Brahmotsavam celebrated during April – May and Poigai Azhwar birthday during Aipassi Thiruvonam star are the two major festivals celebrated in the temple. Poigai Azhwar, one of the alwars, poet-saints of the 7-10th centuries was born at this temple lotus tank. The temple is maintained and administered by the Hindu Religious and Endowment Board of the Government of Tamil Nadu. The temple houses a rare image of Ranganatha recumbent on his left hand, unlike other temples where he is recumbent on his right. Six daily rituals and three yearly festivals are held at the temple. Yathothkari Perumal is believed to have appeared for Saraswati and Thirumalisai Alvar. There is a three-tiered raja gopuram, the temple’s gateway tower, in the temple. A granite wall surrounds the temple, enclosing all the shrines. The temple has three inscriptions on its walls, two dating from the period of Kulothunga Chola I (1070–1120 CE) and one to that of Rajadhiraja Chola (1018-54 CE). The temple is believed to have been built by the Pallavas of the late 8th century AD, with later contributions from Medieval Cholas and Vijayanagar kings. The temple is considered one of the three oldest Vishnu temples in Kanchipuram, the other two are Ulagalantha Perumal Temple and Pandava Thoothar Perumal Temple.
Yathothkari Perumal Temple is considered one of the very oldest temples in Kanchipuram, which is said to be built in the 8th Century AD. It is one of the 108 Divyadesam dedicated to Sri Vishnu, who is worshipped as Yathothkari Perumal and his consort Lakshmi as Komalavalli. The temple was constructed in the Dravidian style of architecture and is glorified in the Divya Prabandha, the early medieval Tamil canon of the Azhwar saints from the 6th–9th centuries AD. Tiruvekkaa Temple or Yathothkari Perumal Temple or Sonnavannam Seitha Perumall is a famous and ancient temple located in Kanchipuram, Tamil Nadu and dedicated to the Sri Vishnu.