Nicolas Poussin's second series of Seven Sacraments, painted between 1644 and 1648 for his close friend and patron Paul Fréart de Chantelou, represents the most ambitious theological pictorial program of the French Baroque - a systematic visual argument for the sacramental theology of the Catholic Church, presented through seven scenes from the life of Christ and the early Church set in historically reconstructed ancient settings.
The commission arose from Poussin's engagement with the Catholic humanist tradition that sought to understand the sacraments not as mere ecclesiastical rituals but as the continuation of specific moments in the ministry of Christ and the apostolic Church. Each of the seven canvases presents one sacrament as a scene from the New Testament narrative: Baptism shows Christ's baptism by John in the Jordan (Matthew 3:16); the Eucharist places the Last Supper in a historically accurate Roman triclinium, the guests reclining as ancient diners did (Luke 22:19-20); Confirmation depicts Christ's post-Resurrection commissioning of the disciples; Penance shows the woman washing Christ's feet (Luke 7:38); Ordination presents Christ's appointment of Peter as shepherd (John 21:15-17); Matrimony depicts the marriage at Cana; Extreme Unction shows the anointing of the sick from James 5:14-15.
The historical accuracy of the settings was Poussin's distinctive contribution. He was the most scholarly painter of his generation, a student of ancient texts and artifacts who read Josephus, the Church Fathers, and classical authors in his attempts to reconstruct the physical world in which the Gospel events had occurred. His Last Supper places the disciples not at a long table in the medieval manner but reclining on Roman couches in a triclinium arrangement - historically accurate, as Jesus and his disciples would have followed Roman dining customs for a formal meal. This archaeological precision was not pedantry but theological argument: the sacraments had historical roots in specific, embodied events, and their meaning was inseparable from those events.
The Chantelou series replaced an earlier set of Seven Sacraments painted for Cassiano dal Pozzo in Rome (now divided between the Duke of Rutland's collection at Belvoir Castle and the National Gallery of Scotland). The Chantelou series is considered superior by most art historians, the composition more fully resolved, the color more sophisticated. Chantelou himself commissioned a special room to display the complete series and wrote an account of his conversations with Poussin about the works - one of the most valuable primary sources for understanding 17th-century French ideas about the relationship between painting and theology.
Poussin articulated in letters his theory of the 'modes' - the idea, drawn from ancient music theory, that different subjects required different compositional and coloristic registers, just as different musical modes expressed different emotional characters. The Seven Sacraments series put this theory into sustained practice: the Eucharist canvas, depicting the most solemn of the sacraments, uses a deeper and more restrained palette than the more narrative Baptism or the emotionally warmer Penance. The series is as much a meditation on the resources of painting to convey theological distinctions as it is a statement about the sacraments themselves.
The paintings were dispersed after Chantelou's death and the series is no longer intact in a single location. The complete set - or reconstructions of it from reproduction - must now be assembled in the imagination. But the theological ambition they represent remains fully legible: Poussin's conviction that the highest function of painting was to serve the deepest purposes of human understanding, including the understanding of divine grace working through historical, embodied acts.