Mercury Rescues the Disguised Io after Beheading Argus

Johann Michael Rottmayr began painting ambitious series like this onein his native Salzburg, Austria, after returning from several years of artistic training in Venice. His new works featured mythological subjects, energetic compositions, and a saturated palette—the same qualities that inspired Flemish Baroque artists. Here, the Roman god Mercury has beheaded the guardsman Argus, whose crimson blood pours out from his neck onto the ground below.

Mortal Io, who has been transformed into a cow by her lover Jupiter, looks on placidly as Mercury rescues her from her imprisonment by Jupiter’s jealous wife, Juno.

Executed in Oil on canvas, measuring 81.3 × 125.2 cm (32 × 49 1/2 in.), the surface rewards close looking. Johann Michael Rottmayr builds the composition through layered glazes and a tightly controlled palette, letting cool shadows recede so that the warm, lit passages step forward.

Look closely and the painting opens up. Objects you might pass over — a folded letter, a half-drawn curtain, the angle of a glance — were placed to be read. Every prop in a portrait like this is a decision — jewelry, fabric, and hand position were negotiated between painter and patron to shape how the sitter would be remembered.

Art Institute of Chicago in Chicago now holds the work, where conservators and historians continue to revisit its condition and attribution. Each generation of scholarship adds a layer to how Johann Michael Rottmayr's output from this period is understood.

“A silence so complete it becomes its own witness.”