The Royal Parish's members consist of the employees of the Royal Court and their families. Every Sunday mass is held where everyone is welcome.
Everyone is also welcome to the Royal Chapel's music programme, featuring organ and classical music concerts.
During the summer season the chapel is open to the public twice a week, allowing a viewing of the interior, architecture and art.
Carl Hårleman completed the chapel's interior in the mid-1700s, largely following Tessin the Younger's plans. Sculptures, statues and ceiling paintings have been carried out by the foremost craftsmen of the period.