The current Cathedral of Concepción, the Catedral de la Santísima Concepción, was built in the 1940s after the previous one collapsed in the great earthquake of 1939. It is a sober reinforced-concrete building in restrained neoclassical style — practical, designed to survive whatever the fault throws at it next.
The interior is plain by South American standards but has a good organ and several twentieth-century stained glass windows worth a look. It anchors the western edge of Plaza Independencia and is a useful five-minute stop while wandering the centre. Mass times are posted at the entrance.