Devalokam Aramana is the official residence of the Catholicos of the East and Malankara Metropolitan. The administrative headquarters of the Church also functions within the same premises. The holy relics of the Apostle St. Thomas is kept in the Devalokam Aramana chapel. The mortal remains of holy fathers – H.H. Baselius Geevarghese II, H.H. Baselius Augen I, H.H. Baselius Mar Thoma Mathews I, H.H. Baselios Marthoma Paulose II and Metropolitan Thomas Mar Macarios are entombed here.

Parumala Seminary is the major pilgrim centre of the Church, blessed by the shrine and mortal remains of St. Gregorios. The mortal remains of Metropolitan Yuyakim Mar Ivanios are also entombed here.

The mortal remains of Catholicos Baselius Geevarghese I and Metropolitan Augen Mar Dionysius are entombed in the chapel.

Founded in A.D. 63 by the Apostle St. Thomas, keeping the ancient structure and architectural beauty, this Church is now an international pilgrim centre.

The Dayara was started by Metropolitan Kuriakose Mar Gregorios (Pampady Thirumeni), whose mortal remains are interred in the chapel. The mortal remains of the Metropolitan Mathews Mar Ivanios are also entombed here. The Dayara is a holy place for pilgrims and a centre of so many educational, social service institutions.

As the earliest place of monastic life in the Church, Vettickel Dayara had influenced many Church dignitaries. As a young monk and later as a metropolitan St. Gregorios stayed and spent long time here in fasting and praying.

A portion of the holy relics of St. George is kept in this church. The historic monument of Coonen Cross Oath (A.D. 1653) is now a declared pilgrim centre.