Invocation (Debussy)Invocation is a composition for men's choir and orchestra, with a solo tenor, by Claude Debussy. It is a setting of a text by Alphonse de Lamartine.HistoryDebussy composed Invocation in 1883, setting a text by Alphonse de Lamartine in a three-partite form for men's choir and orchestra, with a solo tenor in the middle section. A vocal score was published in 1928, and a full score in 1957.