Alexandre Aguado, marquis de Las Marismas (1784-1842)

The artist employs a dark background to create a strong contrast, highlighting the subject's features and attire. This use of chiaroscuro adds depth and dimensionality to the portrait.

The painting reflects the artistic traditions of portraiture in the early 19th century, where subjects of nobility or high social status were often depicted in formal, dignified settings to emphasize their rank and character.