There seems to be a distinct change in Gabrieli's style after 1605, the year of publication of Monteverdi's Quinto libro di madrigali, and Gabrieli's compositions are in a much more homophonic style as a result. There are sections purely for instruments – called "Sinfonia" – and small sections for soloists singing florid lines, accompanied simply by a basso continuo. "Alleluia" refrains provide refrains within the structure, forming rondo patterns in the motets, with close dialogue between choirs and soloists. In particular, one of his best-known pieces, In Ecclesiis, is a showcase of such polychoral techniques, making use of four separate groups of instrumental and singing performers, underpinned by the omnipresent organ and continuo.