The Church of Ordem Terceira do Carmo, in Rococo style, was designed by the painter, architect and professor from Viseu José de Figueiredo Seixas for the Venerável Ordem Terceira do Carmo [Venerable Order of Terceira do Carmo], which he joined along with his wife in 1760.
The first stone of the temple, built on land once owned by the Discalced Carmelite monks, was blessed on 12 August 1756.
The church has a façade with prominent cornices and undulating lines; the side façade is covered with traditional blue and white glazed tiles, depicting the patron saint, produced by Carlos Branco from drawings by Silvestre Silvestri, in 1912. There is an altarpiece with protruding bases, done by the famous woodcarver Francisco Pereira Campanhã (1773).
The hidden house, located between the Church of Nossa Senhora do Carmo and the Terceiros do Carmo Church, identified in tourist guides as the narrowest house in Porto, was built in 1768. Old residence for the chaplains of the Church of the Terceiros do Carmo and occasionally occupied by artists and doctors at the service of the Order of Carmo, in the last decades was home of the caretaker of the Church. Today it can be visited by tourists. It was also used to host meetings of the Administrative Council of the Order of Carmo, during troubled times in the history of the city and country, particularly during the French Invasions (1807-1811), the Siege of Porto (1832-1833) and the establishment of the Republic (1910).