A calendar with dates for concerts, broadcasts, new presentations with Ensemble Leones can be found here. Other dates involving Marc Lewon (with other ensembles) can be found on his personal website where all his dates are listed:
Link to the calendar on Marc Lewon's website.
Su 16.01.
11.00
Tu 25.01.
Su 27.02.
17.15
Su 27.02.
19.15
Th 31.03.
18.00
Die Schweiz als Zentrum Europas
Ensemble Leones
CH-Fribourg, Museum für Kunst und Geschichte
Route de Morat 12