In Sketch of angel for the painting ‘The Immaculate Conception’, we see a delicate figure of an angel. The colors are soft, predominantly featuring light blues and whites, which evoke a sense of purity. The angel is depicted with flowing robes and gentle features, set against a minimal background that emphasizes its form.

This sketch serves as a preparatory work that captures the essence of the angel intended for a larger composition. The sketch is executed in ink on paper, showcasing Simmler's skill in capturing the fluidity of the angel's form. The lines are fine and precise, indicating careful planning for the final painting. Viewers can observe the intricate details in the angel's wings and facial expression, which convey a serene demeanor.

This work is an essential part of the artistic process, revealing the artist's intention before the final execution. Józef Simmler was a Polish artist known for his religious themes and attention to detail. This particular sketch is significant as it was created as a study for The Immaculate Conception, a popular subject in Catholic art. An interesting fact about this work is that it reflects the Rococo style, characterized by its ornate details and soft colors.

Simmler's sketches are less known but provide valuable insight into his artistic process and the development of his larger works.