A unique Christmas atmosphere evoke the advent and Christmas songs and carols. Their interpreter will be singing for example Besharmonie student body. File under this name was established at the Jaroslav Heyrovský grammar school in the autumn of 2000. Currently works with over 50 singers. The largest part consists of current and former students and students of grammar school and high school Of Jaroslav Heyrovský Kavalírkou, where the choir also tested once a week and which it represents. Besarmonie choir is in good condition, each year undergo dozens of concerts and also the least 3 weekend and 1 weekly focus.