Complex sentence: He is commonly known as "the painter of light" and his work is regarded as a Romantic preface to Impressionism, and some of his works are cited as examples of abstract art prior to its recognition in the early 20th century.
Split into simpler sentences: He is commonly known as "the painter of light" and his work is regarded as a Romantic preface to Impressionism. Some of his works are cited as examples of abstract art prior to its recognition in the early 20th century.