The title Ex Tribus Fontis (Latin for ‘from three sources’) refers to the three sources of inspiration that were used for this composition. The legend of Saint Donatus, patron saint of the commissioning band describes how he and his soldiers prayed to God during a losing battle, the result of which being a thunderstorm which annihilated the Teutonic opponents. This three movement piece is extremely impressive and very much suitable for both concerts and contests.