Listen to In Festo Assumptionis B.M.V.: Graduale (Propter veritatem) online. In Festo Assumptionis B.M.V.: Graduale (Propter veritatem) is an English language song and is sung by Karel Frana and Boni Puncti. In Festo Assumptionis B.M.V.: Graduale (Propter veritatem), from the album Voices of Chant, was released in the year 2010. The duration of the song is 2:03. Download English songs online from JioSaavn.