Mar Thoma Cheriyapally is a Jacobite Syrian Orthodox Church located in Kothamangalam town of Ernakulam district, Kerala, India. The church is believed to have been established in 1455 by 18 families who separated from Marth Maryam Valiyapally. The church is famous for the feast of Mor Baselios Yeldo, a Syriac Jacobite saint who preached in Kothamangalam. After his death, he was entombed in the altar room of this church. The church had witnessed many historic events of the Malankara.

The present region of Kothamangalam was historically known as Malakhachira (മാലാഖച്ചിറ, which literally means "Place of the Angel"). According to church history, the Syriac Orthodox Bishop, St. Baselios Yeldo Maphrian reached the church in the year 1685, on 11th of Kanni month of the Malayalam calendar.

The name Yelda (East Syriac) / Yeldo (West Syriac) means Christmas. Yelda/Yeldo lent (Nativity lent) starts 15 December till 25 December. Various spellings are used to write Yeldo (യെൽദൊ) in English (Yeldho, Eldho, Eldo).

Basil is the short form for Baselios, a Greek word that literally means "king" or "emperor", and is used to refer to St. Basil of Caesarea.

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  Kanni 20 Perunal Night At Mar Thoma Jacobite Syrian Cheriapally, Kothamangalam
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  Main Madbaho (altar) and tomb of Mor Baselios Yeldho.
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  Tomb of Mor Baselios Yeldo
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  Manchal (Palanquin) used by Mor Baselios Yeldo.
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  View from the Poomukham (front face) of the church.

• Baselios Yeldo
• Marth Mariam Valiyapally Kothamangalam

• Cheriapally.org