Just found these two concerts, coming up within the next few weeks!
A Telemann suite (mentioned in this article)
Missa Votiva ZWV18, Neumeyer Consort and 2 different choirs, conducted by Markus Stein.
St. Maria Magdalena, Brotdorf
Sunday 25th October 2015 (this Sunday) - 17:00 - with Collegium Cantorum Merzig
Sunday 8th November 2015 - 17:00 - with Thomaskantorei Hofheim
1st event Choir: http://www.collegium-cantorum-merzig.de/
2nd event Choir: http://www.thomasgemeinde-hofheim.de/