William III on a grey charger observed by Neptune, Ceres and Flora. Mercury in the sky and Astrea Sir Godfrey Kneller (1646-1723)

The composition presents a central figure mounted on a powerful grey charger, dominating the foreground. He is clad in armor and a crimson cloak, his posture suggesting both authority and readiness. The horse itself is rendered with considerable detail, its musculature conveying strength and vitality. A dramatic landscape unfolds behind him: a rocky outcrop to the left, hinting at an untamed wilderness, contrasts sharply with a distant seascape visible on the right.
Above this terrestrial scene, a celestial realm is depicted. Several figures float amidst swirling clouds; they appear as mythological personifications. One figure, clearly Mercury, holds aloft a caduceus, his presence signifying commerce and communication. Two cherubic figures are also present, adding to the sense of divine observation. A female figure with wings, likely Astraea, stands amongst them, symbolizing justice and innocence.
To the left of the mounted figure, a partially obscured male figure emerges from the rocky terrain; he appears to be bound or restrained, suggesting a conquered adversary or a symbolic representation of subjugated forces. On the right, a female figure in classical garb extends her hand towards the rider, offering what seems to be a laurel wreath and a branch of olive – emblems of victory and peace respectively. Another winged female figure stands beside her, also gesturing toward the central figure.
The color palette is dominated by cool tones – grey, blue, and brown – which contribute to a sense of grandeur and solemnity. The use of light is strategic; it illuminates the rider and his horse, drawing attention to their importance within the scene while leaving other areas in shadow, creating depth and mystery.
Subtly, the painting conveys themes of power, legitimacy, and divine favor. The inclusion of mythological figures suggests a connection between the earthly ruler and the celestial realm, implying that his authority is sanctioned by the gods. The conquered figure and the offering of peace symbols likely allude to military triumphs and the establishment of order. The overall effect is one of carefully constructed propaganda – a visual declaration of strength, virtue, and divine endorsement.