| | Boucher | French painter. |
| Eric | Braun | Anne-Catherine's attorney. |
| Robert | Breitweiser | The acclaimed Alsatian Expressionist. |
| Ronald | Breitweiser | Stephane's father. Executive manager of a Department Store Chain. |
| Stephane | Breitweiser | Art thief. AKA: Steph. |
| | Brueghel | Artist. |
| Henri | Brunner | A Strasbourg Psychologist. |
| Julius | Ceasar | Roman dictator. |
| Noah | Charney | The professor wo founded the Association for Research into Crimes against Art. |
| Queen | Christina | (Of Sweden). Paid her Generals in artwork in 1648. |
| Myles | Connor JR. | New England criminal mastermind. |
| Hernan | Cortes | Former Governor of New Spain. |
| Lucas | Cranach (1) | Painted Sibylle of Cleves. AKA: Lucas Cranach The Younger. |
| Lucas | Cranach (2) | Lucas Cranach (1)'s father. AKA: Lucas Cranach The Elder. |
| Salvador | Dali | Artist. |
| Bernard | Darties | An OCBC agent. |
| Corneille | de Lyon | A court painter. |
| | Durer | German painter. |
| Fabrice | Duval | A psychiatrist Steph saw in 1999. |
| Christian Wilhelm | Ernst Dietrich | 18th Century German realist. |
| Charles | Francois-Hannong | Dutch ceramicist. |
| Emile | Galle | French artist. |
| | Goyen | Spanish artist. |
| Richard | Green | An iconic London dealer. |
| Charley | Hill | One of the art-hunting greats. |
| Saint | Jerome | Early Christian theologian. |
| Anne-Catherine | Kleinklaus | Art thief accomplice. Stephane's girlfriend. AKA: Nena. |
| Joseph | Kleinklaus | Anne-Catherine's father. A line cook. |
| Edward | Lloyd | Founded Lloyd's of London. |
| | Lysippus | A celebrated sculptor in 4th Century BC. |
| Graziella | Magherini | The Chief of Psychiatry at Florence's Central Hospital. |
| Christian | Meichler | One of Steph's closest friends. |
| Werner | Meunsterberger | A German psychoanalyst. |
| Joan | Miro | Artist. |
| Ginette | Muringer | Anne-Catherine's mother. A day care worker. |
| | Nebuchadnezar | The Babylonian King. |
| Catherine | of Alexandria | An early Christian Saint. |
| Vicenzo | Peruggia | The first man who took the Mona Lisa. |
| Georg | Petel | Sculpted an ivory Adam and Eve. A German carver. |
| Aline | Philippe | Stephane's maternal grandmother. |
| Pablo | Picasso | Artist. |
| Gery | Pieret | A Belgian conman and serial thief. |
| Francisco | Pizarro | Former Governor of New Castle. |
| Cesar | Redondo | French psychologist. |
| | Rembrandt | Dutch painter. |
| Peter Paul | Rubens | The great Flemish painter of the 17th century |
| Michel | Schmidt | Swiss psychotherapist. |
| Lucienne | Schneider | French psychologist. |
| | Stendhal | French writer who wrote about his experience in Florence's Stan Croce Basilica. |
| Joseph | Stengel | Stephane's maternal grandfather. |
| Mireille | Stengel | Stephane's mother. A hospital nurse specializing in Child Care. |
| Jan Brueghel | the Elder | Flemish artist. |
| Jan Van Kessel | the Elder | Artist. |
| Pliny | the Elder | A historian. |
| Constantine | The Great | Former Roman emperor. |
| Erin | Thompson | A professor at John Jay College of Criminal Justice. |
| Willem | Van Aelst | Dutch artist. |
| Willem | Van Mieris | Dutch golden age master. |
| David | Vinckboons | Dutch landscape master. |
| Alexandre | Von der Muhll | A Swiss inspector specializing in Art Crime. |
| Andy | Warhol | Artist. |
| | Watteau | French painter. |
| Semir | Zeki | A professor of neuroscience at the University College of London. |
| Cranach | | German painter. |
| Cupid | | God of desire, erotic love, attraction, and affection. |
| Darties | | French art inspector. |
| Diana | | The Roman Goddess of hunting and fertility. |
| Francois I | | The famously art-struck King. |
| Medeleine | | Francois's teenage daughter. |
| Napoleon | | French Military and political leader. |
| Napoleon | | Former emperor of the French. |