In 1851 a patron named Ogden Haggerty sponsored Inness' first trip to Europe to paint and study.
Inness spent fifteen months in Rome, where he studied landscapes by Claude Lorrain and Nicolas Poussin.
 He also rented a studio there above that of painter William Page, who likely introduced the artist to Swedenborgianism.
 In 1853 he was elected into the National Academy of Design as an Associate member and became a full Academician in 1868.

During trips to Paris in the early 1850s, Inness came under the influence of artists working in the Barbizon school of France.
Barbizon landscapes were noted for their looser brushwork, darker palette, and emphasis on mood.
Inness quickly became the leading American exponent of Barbizon-style painting, which he developed into a highly personal style.
In 1854 his son George Inness, Jr., who also became a landscape painter of note, was born in Paris.

In the mid-1850s, Inness was commissioned by the Delaware, Lackawanna and Western Railroad to create paintings which documented the progress of DLWRR's growth in early Industrial America.
The Lackawanna Valley, painted c. 1855, represents the railroad's first roundhouse at Scranton, Pennsylvania, and integrates technology and wilderness within an observed landscape; in time, not only would Inness shun the industrial presence in favor of bucolic or agrarian subjects, but he would produce much of his mature work in the studio, drawing on his visual memory to produce scenes that were often inspired by specific places, yet increasingly concerned with formal considerations.
In 1851 a patron named Ogden Haggerty sponsored Inness' first trip to Europe to paint and study. Inness spent fifteen months in Rome, where he studied landscapes by Claude Lorrain and Nicolas Poussin.  He also rented a studio there above that of painter William Page, who likely introduced the artist to Swedenborgianism.  In 1853 he was elected into the National Academy of Design as an Associate member and became a full Academician in 1868.
During trips to Paris in the early 1850s, Inness came under the influence of artists working in the Barbizon school of France. Barbizon landscapes were noted for their looser brushwork, darker palette, and emphasis on mood. Inness quickly became the leading American exponent of Barbizon-style painting, which he developed into a highly personal style. In 1854 his son George Inness, Jr., who also became a landscape painter of note, was born in Paris.
In the mid-1850s, Inness was commissioned by the Delaware, Lackawanna and Western Railroad to create paintings which documented the progress of DLWRR's growth in early Industrial America. The Lackawanna Valley, painted c. 1855, represents the railroad's first roundhouse at Scranton, Pennsylvania, and integrates technology and wilderness within an observed landscape; in time, not only would Inness shun the industrial presence in favor of bucolic or agrarian subjects, but he would produce much of his mature work in the studio, drawing on his visual memory to produce scenes that were often inspired by specific places, yet increasingly concerned with formal considerations.
George Inness