RICHES OF CHRISTMAS, ORGAN CONCERT, LIVE NATIVITY

‘RICHES OF CHRISTMAS’: Laura Bertone, director of worship for the archdiocese, visits with host J.A. Gray on Mosaic, Dec. 23, 5:30 a.m., KPIX Channel 5. The two unwrap “some of the forgotten or neglected treasures and tales of the sacred season when God became man,” producers said. The Christmas season offers a rich array of feasts and remembrances from Dec. 25 through Jan. 13, the baptism of Jesus. sfarch.org/mosaic-tv.
ORGAN CONCERT: Christoph Tietze, music director and organist for St. Mary’s Cathedral, celebrates his 50th year as a church organist, in concert Dec. 23, 4 p.m., at the cathedral, Gough Street at Geary Boulevard, San Francisco. Chris notes that he played for his “first Mass Dec. 25, 1968.” The program will feature the works of Bach, Pachelbel, Daquin, Franck. Freewill offerings at door. (415) 567-2020. www.stmarycathedralsf.org.
LIVE NATIVITY: Porziuncola Nuova, Vallejo and Columbus, San Francisco, 4:30-7:30 p.m. Presented by The Knights of St. Francis, www.knightsofsaintfrancis.com.