Church and Convent of Saint Antony, Baroque church and monastery in Cairu, Brazil.

The Church and Convent of Saint Antony is a Franciscan complex in Cairu made up of the church, a churchyard with a monumental cross, and the convent to the north. The church facade rises in a stepped triangle: a five-arch galilee at ground level, three rectangular windows with volutes and pinnacles above, a niche holding the patron saint's statue, and a cross at the top. A bell tower stands to the left, set back from the facade, and the unfinished Third Order chapel survives in ruins to the south.

A private chapel built by Domingos da Fonseca Saraiva and Antônia de Pádua Góes stood here before 1650, used by itinerant Franciscans who added cells around it. In January 1650 Frei Sebastião do Espírito Santo sent three friars to found a convent, first built in taipa. The stone cornerstone was laid on 25 August 1654 to a design by Frei Daniel de São Francisco, and the church facade was finished before 1686, the date inscribed on the Paraguaçu convent frontispiece modelled on Cairu.

The church is dedicated to Saint Anthony, and the Third Order chapel beside it was left unfinished as a sign of obedience to the First Order. The design was copied in Franciscan churches at Paraguaçu and Recife, and the complex was listed by IPHAN in 1941.

The church and convent are open to the public and may be visited. The complex is divided into the church of Santo Antônio, a churchyard with a monumental cross, and the convent to the north; the ruined Chapel of the Third Order lies to the south. The site covers 3,215 square metres.

The facade's stepped triangular design has no parallel in European Baroque architecture, and churches in Paraguaçu and Recife were built after its model. The Third Order chapel, set back from the facade as a sign of obedience to the First Order, was begun in the 18th century but never finished; its ruins stand to the north of the site.