In the page's words:

Experience the "MDR Concerts in the Morning" with MDR KLASSIK: In this concert series, our ensembles invite you to a musical Sunday excursion to the Leipzig Gewandhaus on six dates. You can find out more about the individual programs and ticket offers here.

Subscriptions can be purchased via the ticket hotline (0341) 94 67 66 99, at mdr-tickets.de and in the MDR KLASSIK ticket store at Augustusplatz 9a in Leipzig (Mon to Fri: 12 noon to 6 pm, Saturdays 10 am to 2 pm).
Individual tickets are also available.