Known both as Â"Psalm 18Â" and Â"Psalm 19,Â" this famous organ piece is a perfect, fanfare-filled recessional for weddings or other festive services. Based on the biblical text, Â"The heavens declare the glory of God,Â" the organ is registered bright and full, with alternating antiphonal-like sections playing as echoes from one division to another. Marcello was a famous Italian contemporary of Antonio Vivaldi in the baroque era, and this wonderful, very playable, musical celebration is an essential addition to the organistÂ's library.