An installation Mass for Maine’s new bishop will be celebrated Friday at the Cathedral of the Immaculate Conception on Congress Street in Portland.

The appointment of Robert P. Deeley will be celebrated at 2 p.m., according to an announcement posted on the Roman Catholic Diocese of Portland’s website.

Seating will be limited, and tickets are required to attend. The Mass will be televised live on EWTN, the Catholic television network, which is available throughout Maine. The ceremony may also be viewed online at www.CatholicTV.com/watch-live and heard on several radio stations, including the Presence Radio Network (106.7 FM in Greater Portland).

Pope Francis appointed Deeley as the 12th bishop of the Roman Catholic Diocese of Portland in December. The 67-year-old Deeley was ordained auxilliary bishop of Boston on Jan. 4, 2013, at the Cathedral of the Holy Cross in Boston. Born in Cambridge, Mass., Deeley grew up in Belmont, Mass., the fourth in a family of five sons.