what inspired impressionist artists to plant in plein air?

ornate architecture
availability of open art classes
increased religious influence
easier transport of paints in tuber

The main factors that inspired Impressionist artists to paint en plein air (outdoors) were the availability of open art classes, increased interest in ornate architecture, and the invention of portable paint tubes, which made it easier to transport paints. These factors collectively contributed to the development of the Impressionist movement in the late 19th century.

Open art classes began to be established in the mid-19th century, allowing artists to study and paint from nature. This provided them with an opportunity to directly observe and capture the effects of natural light, color, and atmosphere, which became key characteristics of Impressionism. The widespread availability of these art classes enabled artists to venture outdoors and paint directly from nature, rather than relying solely on studio work.

At the same time, there was a growing fascination with ornate architecture, particularly in urban areas. Artists were captivated by the play of light and shadow on elaborate buildings, and they sought to capture the transient effects of sunlight on these structures. Painting en plein air allowed them to immerse themselves in the urban environment and document the ever-changing qualities of light and atmosphere.

Additionally, the invention of portable paint tubes in the mid-19th century greatly facilitated outdoor painting. Before this innovation, artists had to mix their paints from pigments and binders, which required meticulous preparation and limited their ability to paint on the spot. With the advent of paint tubes, artists could easily squeeze out pre-mixed colors onto their palettes, enabling them to work quickly and spontaneously outdoors.

Overall, the combination of open art classes, fascination with ornate architecture, and the inventiveness of portable paint tubes all contributed to the rise of plein air painting among Impressionist artists. This approach allowed them to capture the fleeting qualities of light, color, and atmosphere with greater immediacy and authenticity.