Paintings can be classified into different hobbies or interests that the artist may have.For example,sports-themed paintings would fall under this category.
Nature
Another way to classify paintings is by their subject matter, which could be related to nature.Sky,cloud,mountain,river,flower,grass,lake,forest,and other nature elements are common subjects in paintings.
Places
Paintings can also represent places,such as cities,countries,or specific places.Words like China,USA,playground,library,classroom,garden,school,farm,music room,art room,teacher's office and home can be categorized as place-related paintings.