The Cathedral Basilica of Queen of Peace [1] (Spanish: Catedral-Basílica Reina de la Paz), also called San Miguel Cathedral, is a Catholic church located in the city of San Miguel,[2] El Salvador.

In 1862 the parish church, which bore the name "St Michael Archangel", was demolished to build a larger temple that would also serve as an oratory of veneration for the Virgin Our Lady of Peace.

The first person in charge of its construction was the English engineer William Kirk who had to leave the project shortly after the death of Barrios.

Eight years later, on November 21, 1921, Monsignor Juan Antonio Dueñas y Argumedo proclaimed the Patronage of Our Lady of Peace and gave papal coronation of the image on behalf of Pope Benedict XV.

The cathedral was declared completed in 1962 with the promotion of then pastor Oscar Romero, exactly a century after construction works had started.