What type of art has no visible subject

Abstract art has no visible subject.

Explanation:

Essentially, this type of art is visually stimulating in its representation of form, line, color, etc.

well seeing i am an artist and i actually did a self portrait; i will describe how i painted it.   i used acrylic on a stretch canvas about 4 feet wide by 6 feet tall. i painted myself smiling in a soft pink long dress, white tile floor sitting on a white couch with a table behind and a vase of gorgeous flowers.   i also had a round white hat with a soft pink ribbon through it laying on the floor and on the table behind me was a lit candle. i kept it simple but soft and romantic.

the german artist, architect, and designer, peter behrens