Carl Gedeik, principal organist at the Miraculous Medal Shrine in Philadelphia, invites the general public to the shrine’s opening concert featuring its new four-manual, custom Allen organ this weekend.

Internationally known organist, master teacher, composer and recording artist Roger Nyquist will perform on Sunday, Oct. 2 at 2 p.m.

The all-organ program featuring works by Johann Sebastian Bach, Louis Vierne, Camille Saint-Saens, and Henri Mulet will be live-streamed at, and from the Miraculous Medal App, which is a free download.

He will also conduct a workshop for organists on Saturday, Oct. 1 at 2 p.m. offering practical tips to improve organ playing.

A CD of the two-hour concert will be available for future purchase at the CAMM Gift Shop at for $25. There is no admission cost for either event.