Listed as an historic monument in 1875, since then the Collegiate Church has undergone major works.
On the outside, the Collegiate Church of Ibos is characterised by its monumental chevet with a pinnacle and square bell-tower with a clock at the front. Bricks and stones show through the facing on the walls, which was stripped in 1908.
You enter through a stone porch, which stands out with a more modern look. Inside is a nave in the Languedocian style. This dates from the late 14th century and is the oldest part of the building. The imposing early 15th-century chancel is a seven-sided polygon, with each side containing high mullioned bay windows. On each side of the nave, six chapels are lodged between the buttresses.