This is where Pope Francis worked when he was archbishop of Buenos Aires between 1998 and 2013. The cathedral has been rebuilt six times since its cornerstone was first laid by the city’s founding father Juan de Garay in 1580; construction on this site was completed in 1593. Fusing a mixture of architectural styles, including a Neo-Classical façade and Baroque décor, the cathedral opens daily and now acts as a papal museum; some of Francis' personal artifacts are on display. Look up to observe Baroque inner arches and look down for beautiful Roman mosaic floors. Mass takes place Sunday to Friday four times a day, once on Saturdays.