Side Chapels
The Cathedral has a number of side chapels, or chantries. These were mostly paid for by wealthy local families, so that Mass could be celebrated for their souls after they died.

The largest of the side chapels is the Lady Chapel. Others include the Coulston Chapel, now dedicated as a place of prayer for those who have lost babies during pregnancy or children in their infancy; the Whiteside chantry, dedicated as a place of prayer for the Diocese of Lancaster.

A side altar is also dedicated to St Charles Borromeo, a 16th century Italian cardinal who was patron of the local deanery at the time St Peter's was built.
Interpretation boards around the Cathedral help visitors to understand the building and its purpose
'Inspire', installed in 2006, is situated under the bell tower and includes a large exhibition case
The Cathedral's impressive 240ft spire is visible from many parts of Lancaster
The Cathedral features a number of unusual stained glass windows, such as this window depicting King Herod
The Holy Oils, used throughout the diocese of Lancaster in the sacraments of baptism, confirmation, ordination and anointing of the sick
A touchscreen computer gives details of the Cathedral and the Catholic faith
King Henry VIII, depicted in a stained glass window in the north transept
The reredos on the chapel of St Charles Borromeo