[1] It was formerly the seat of the Bishops of Condom; the diocese was added to the Archdiocese of Auch in 1822.

It was designed at the end of the 15th century and erected from 1506 to 1531, making it one of the last major buildings in the Gers region to be constructed in the Southern French Gothic style of south-west France.

The church has buttresses all around and there is a 40-metre (130 ft) square tower over the west front.

Inside, the wide aisleless nave is lit by the clerestory windows with grisaille glass.

The 16th-century cloister is now a public passageway adjoining a car park, the exterior of which is illuminated at night.