Maurizio Cattelan is well known for the highly provocative nature of his practice. Over the past decade he has created many powerful installations, often presented as interventions into a given space or context where they have a disruptive or unnerving effect. Cattelan was invited to make a series of interventions into the Collection Displays at Tate Modern. Ave Maria, 2007 is the first work in the series. Translated as 'Hail Mary', the title seems to contradict the macho power of the salutes, referring instead to the catholic tradition of revering Mary the mother of Christ, who is saluted by the angel in the annunciation. Although this right-armed salute is believed to have originated as a form of military courtesy for the Romans, it became synonymous with right-wing or extremist political movements in the twentieth century. Placed alongside works dating from the early years of the century with classical or a-political concerns, this intervention may act as jarring reminder of the troubles to come.