The Alangudi Guru Bhagwan Brihaspati Dakshinamurthy Temple, also known as the "Guru Sthalam" for Jupiter.
Apatsahayesvarar Bhagawan Temple is a Hindu temple devoted to Lord Shiva and is located in the village of Alangudi 38 Kms from Thiruvarur town, Tamil Nadu, India.

The temple is also known for being the home of Devguru Brihaspati or the planet Jupiter. As per Hindu Mythology, the nine planets are considered to be gods of heaven, where Earth, Uranus, Neptune and Pluto are replaced by Sun, Moon, Rahu and Ketu. Tamil Nadu has nine temples dedicated to each of these nine celestial beings, and this one is for Jupiter.

The temple is one of the nine Navagraha temples of Tamil Nadu and is a part of the popular Navagraha in the state - it houses the image of Guru (Jupiter). The planets are believed to influence the horoscope computed based on time of one's birth and subsequently influence the course of life. Each of the planets are believed to move from a star to another during a predefined period and thus sway over an individual's fortunes. The Navagrahas, as per Hindu customs, are believed to provide both good and bad effects for any individual and the bad effects are mitigated by prayers. As in other Navagraha temples, the common worship practises of the devotees include offering of cloth, grains, flowers and jewels specific to the planet deity. Lighting a set of lamps is also commonly followed in the temple. As per contemporary Saivite belief, the energies distributed cyclically by Navagrahas can be channeled based on remedial measures. As per local legends, Shiva, the overlord of the nine planetary deities, allowed them to freely grant wishes based on devotion of the devotees.

Guru is linked to fortune, advantage and lot of money. The unfavourable place in the astrology can cause skin issues, joint disease, heart relevant issues, fear & discomfort. Guru blesses his enthusiasts with child, good knowledge, valour, extended life and treat from illnesses. Devotees lights 24 ghee lights and do pradharshanam (circumambulation) of Shiva's shrine 24 times. Promotions of yellow-colored fabric, konda kadalai (chick pea) and vella mullai (a kind of Jasmine) are made to Guru here. The transportation of Guru, known as Guru Peyarchi which happens every year, is an essential event in this shrine. Thursdays being the day of Guru is very essential. Going on a fast or consuming only once (oru pozhudhu) on Thursdays is suggested. Bananas and sodium is to be prevented on these days.