the cathedral is open to the public  between 7 am to 6 pm every day, and mass is held saturdays and sundays at 10 am and mondays and fridays at 11 am.

located on avenida chile 245, centro, the cathedral can be contacted via phone at 21 2240.2669 or 21 2262.1797, via email on this link, or via the official website.

the cathedral metropolitana de são sebastião can be seen on this wikimapia, and within a city map on this link - of very easy access, not far for the carioca subway station, and can be seen on this google map.