Thirunakkara Mahadeva temple, Kumaranalloor Devi temple, Manarcad Palli Valiya Palli, Cheriya Palli, Marthoma Palli, Puthuppally Palli, and Thazhathangadi Juma Masjid.
Thirunakkara Mahadeva temple, at the heart of the town, is a Shiva temple built in the Kerala style of temple architecture, with interior murals depicting themes from the Hindu epics. It was built at the beginning of the 16th century by the then Raja of Thekkumkur. The annual temple festival that culminates in a ceremony called the Aaraattu, attracts large number of devotees. The other famous temples include the Ettumanoor and Vaikom temples dedicated to Lord Shiva and a temple dedicated to Goddess Saraswathi at Panachikkad(also known as Dakshina-Mookaambika). All these temples are rich in lore and festivities and attract a large number of pilgrims from all over the country. Kumaranalloor Devi temple, located near the banks of Meenachil River is famous for its cultural heritage. The sreekovil is beautifully illustrated with Mural Paintings. Karthika, the birth star of Devi is celebrated in the ninth day of the 10 Day long temple festival attracts lot of pilgrims from all over the country. Kumaranallor and nearby place Kudamaloor is also famous in the name of artists. Great Kathakali artists like Kudamaloor Karunakaran Nair, Kuroor Vasudevan Nampoothiry (Vesham), Mathoor Govindankutty, Kuroor Cheriya Vasudevan Nampoothiry (Chenda), famous flute maestro Kudamaloor Janardhanan etc. to name a few.
Kottayam is a major center for Syrian Christians in Kerala. Syrian Christians include Syro-Malabar Catholic, Syro-Malankara Catholic, Jacobite Syrian Christian Church (Jacobite), Malankara Orthodox, Marthoma, Knanaya, and a few members of the CSI Madhya Kerala Diocese.
St. Mary's Church, the Valia Palli (the Big Church) was built in 1550 by Knanaya Syrian Christians who immigrated from West Asia, and is considered the first Christian church in Kottayam town. This church is famous for its
