In Portrait of Architect Johann De Colle, the viewer sees a dignified man dressed in formal attire. The colors are rich, with deep browns and subtle highlights that suggest a warm light source. De Colle's expression is serious, reflecting his professional demeanor.

The background is muted, allowing the figure to stand out prominently. The painting is executed in oil on canvas, a medium that allows for detailed textures and depth. The artist employs a realistic style, capturing the nuances of light and shadow on De Colle's face. The composition is balanced, with the figure centrally placed and the background providing a soft contrast.

The dimensions are approximately 70 x 90 cm, making it a sizable portrait. Anton Romako was known for his portraits and architectural subjects, reflecting the spirit of the 19th century. This work showcases his ability to blend realism with a keen understanding of his subjects. An interesting fact about this painting is that it was commissioned to honor Johann De Colle's contributions to architecture in Vienna.

Romako's attention to detail in this portrait highlights the respect he had for his subject's profession.