Thirupalkadal Sreekrishnaswamy temple is known as Adikulakovil of Ay kingdom. The temple was constructed by the Ay Kingdom (Kupaka), who were ruling the place with their capital at Keezhperoor, during the only recorded Sangam period. This family was later known as Venad, and then 'Thiruvadi', and finally 'Thiruvithamkur' which was finally corrupted into Travancore. According to Dr. M.G Sasibhooshan, a historian, the temple was constructed about 2000 years ago with a square shaped Sreekovil by Ay Dynasty's Keezhperoor Swaroopam. The temple was renovated in 9th century CE by the Venad King Vallabhan Kotha of Keezhperoor Illam. The Keezhperoor Swaroopam was formed by the merger of the Chera dynasty based at Mahodayapuram with the Ays of Vizhinjam.

The temple is constructed in the ancient Dravidian style, with the presence of Brahma and Shiva in the outer wall of circular shaped garbhagriha, which represents the presence of Parabrahma. The roof of the sanctum sanctorum is formed by 36 rafters carved in 12 wooden pieces (of 30 degrees each), representing the 12 rashis which when multiplied by 3 (the number representing the Trimurti) equals 108, which is the number of pithas of Adi Parashakti. It is also believed that the Kollam Era started with the renovation of this temple.

During classical period the temple were administered by the Ay royal family of Keezhperoor illam. In 12th century CE, 343 ME the temple administration was handed over to uralar sabha a council consisting of Brahmins and Madambi Nairs in the ratio 8:2 by Sri Vira Udayamarttandavarman Tiruvadi, Ilayaguru of Venad. He also fixed the expenditure of the temple in respect of the conduct of the daily bali-ceremony and other expenses connected with god's worship and yearly festival of the temple. The village of Kilimanoor with the forests, arable lands and compound sites included in it was granted by the King for the expenses connected with feeding of Brahmans and conducting local temple festivals. 3 para of paddy required for the daily expenses of the temple. 31 nali rice was given to temple servants as salary. The temple had 1 melsanthi, 2 kizhsanthis, and 12 servants including flower supplier, watchman, woman servant, and drummers. Total amount of 5 Achchu was collected from Melsanthi, Kizhsnthi, Variyan, Pallittayam as entrance fees and this amount was to be utilised for the purchase of or repairs to the temple utensils and other wastages without allowing koyimars and uralars who superintended the temple affairs to utilise any portion of it for their own use. This expenditure had to be looked after by batches of two persons for each year. If the above expenses were not properly administered, the incumbents of the year will have to vacate their posts in the Uralma and that they should also settle any slight disputes or entanglements that they may occur with reference to the temple holdings or to the temple itself.

The temple flourished till mid of 20th Century with its tremendous impact on the socio-cultural fields. Till 26/12/1965, Managing Trustee of the Thirupalkadal Devaswom was Brhmasree Narayanaru Narayanaru of Amunthuruthimadom (keezhcheri) one of the prominent Malayala Namboothiri illom situated at Attingal Near Manampoor Alamcode (Chirayinkeezh Taluk, Thiruvananthapuram District, Kerala State, India)(they are also the managing trustees of Thirumanampoor Subramanya Temple) belonging to Chenganoor Malayalam Namboothiri Brahmana Illom they are also the representative of his Highness Maharaja of erstwhile Travancore in Thiruvattar Adikesava Perumal Temple.

In 1965, as per the court order, Brahmasree Narayana Narayanaru handed over the administration of the Temple to No.3200 Ambikavilasama Nair Service Society Karayogam of Keezhperoor.

Post-Colonial period edit

After Independence, when the leasing-subtenants became owners, it adversely affected the temple administration and the priest also stopped worship to deity. In the 1980s, 3200 Ambikavilasam Nss Karayogam got ownership from uralars and started the renovation process of the temple. In 2012 his HighnessUthradom Thirunal Marthanda Varma visited the temple which revealed the relationship of Travancore Royal family with Thirupalkadal Sreekrishnaswamy Temple. Following this event an Ashtamangala Devaprasnam and Murajapam were conducted at the temple. In 2015 temple committee organised a 12-day pooja as specified in the Devaprasnavidhi in presence of Thantri Thekkedath Kuzhikkattillathu Vasudevan Bhattathirippadu. During the pooja Mooppil Swamiyar of Thrissur Thekke Madhom (Vasudevananda Brahmananda Bhoothi) visited temple and performed Pushpanjali.

The temple complex has granite walls enclosing it. Immediately on entering the eastern Nata, on either side a long granite foundation of the structure is visible. On the grounds to the front and right of the Deity and at an elevation, stood a Koothampalam, seemingly of modest measurements. There is an Anakkottil of impressive dimension stands in front of the temple. The principal Belikkallu is situated as usual, in front of the main entrance leading to the inner regions. The belikkapura has long fallen down. The detached pillars of Namaskara Mandapam has wooden pilasters on four sides, so also four stone pillars with two facing the sopanam carrying stone carvings. The square shaped copper tiled roof carries a crest spot on top. The inner ceiling is decorated with wooden houses. The granite sopanam leading to the inner areas connecting the sanctum rise from ground level to the front door in six steps. The balustrades on either side present a lion's head with a long rolled tongue. At the end of it there is a well executed carving of Shiva with Parvati sitting on his lap. It also contains a small Ganesha, Murugam and a reclining Nandi. The balustrade on the opposite side offers the four-armed Vishnu holding the discus, conch, mace, and the lotus. Sreedevi is present on one side of him and Bhudevi on the other. The Sreekovil is circular, copper tiled and in procession of an inner encircling corridor. Mural paintings about Krishna leela used to adorn the walls.

• Travancore Archaeological Series vol 1 to 7, ISBN 81-86365-73-7
• Rudrakshamala by Aswathi Thirunal Gowri Lakshmi Bayi published by TBS books ISBN 978-81-300-1547-7, 9788130015477

• GeoHack - Thirupalkadal Sreekrishnaswamy Temple