Cathedral of san sebastian, Catholic co-cathedral in Coronel Fabriciano, Brazil

The Cathedral of Saint Sebastian is a Catholic co-cathedral in Coronel Fabriciano, Brazil. Its main facade, facing east onto São Sebastião Street in the Santa Helena neighborhood, is shaped like an isosceles triangle whose side edges do not reach the ground; the side facades are each composed of three such triangles. The structure is built of structural masonry in concrete blocks, and colored stained glass windows between iron columns and the roof depict biblical passages at the ends of each triangle. The interior holds 1,200 people.

The campaign for a larger temple began in February 1987, after the 1949 Parish Church proved too small. The project was designed by architect Ronei Lombardi Filgueiras and led by Father Élio da Silva Atahyde; the cornerstone was laid on 20 January 1988. The co-cathedral was inaugurated on 4 July 1993, with 38 religious present. Part of the roof collapsed on 12 May 2022, and demolition for reconstruction began on 16 September 2024.

The Feast of Saint Sebastian, Ash Wednesday, Holy Week, the Coronation of Mary and the Misa de Gallo of the Saint Sebastian Parish are celebrated around the co-cathedral. Since 2006 the Chrism Mass with the blessing of the holy oils on Holy Thursday alternates yearly between Coronel Fabriciano and Itabira. The parish has been run by the Congregation of the Redemptorist Missionaries since August 1948.

The cathedral stands on Rua São Sebastião in the Santa Helena neighborhood, with its main facade facing east. The building was closed by Civil Defense after part of the roof collapsed on May 12, 2022, and demolition of the entire roof began on September 16, 2024, for reconstruction. Access for machinery during the works was made through Colégio Angélica at the rear of the grounds.

The architectural design draws inspiration from the Cathedral of Tokyo and biblical desert tents, creating a contemporary religious structure in Minas Gerais.