Holy Trinity, Oxford, will host its next Red Door Community Concert on Friday, October 6 at 12:15 p.m. Dr. Christina Haan will perform “In Praise of Great Teachers”, exploring organ works from the 18th to 21st century on the the Nordlie Opus 27 organ. Haan, the organist at Knox Presbyterian Church, is also a vocal coach at Miami University and an opera coach at the American Institute of Musical Studies in Graz, Austria.