The downside of abstract art can include difficulty in understanding the work, lack of recognizable subjects, and potential difficulty in marketing and selling the work.

Abstract art became popular in the early 20th century as artists sought to explore new forms of expression beyond traditional representational art.

Pablo Picasso is known for his contributions to the development of abstract art, particularly in his Cubist works.

Hilma af Klint is often referred to as the queen of abstract art, as she was one of the earliest female abstract artists and created pioneering works in the early 20th century.

Many artists create abstract art, including Wassily Kandinsky, Jackson Pollock, Mark Rothko, and Joan Mitchell, among others.

"Starry Night" by Vincent Van Gogh is not usually considered an abstract work, as it is representational and based on real-life subjects.

Some techniques commonly used in abstract art include pouring, dripping, splattering, and layering of paint and other materials.

Abstract art can be expensive because it often requires a high level of skill and creativity, and the best examples can command high prices on the art market.

Starting an abstract painting can involve exploring different mark-making techniques, experimenting with color and form, and allowing the painting to evolve through the process.

Van Gogh is not usually considered an abstract artist, as his work is generally representational and based on recognizable subjects.