Everyone that is aware of movements in the art will know that trends and styles seem to go in cycles. The vast majority of them come and go in less than a couple of years so that you are left with a painting that is highly unfashionable at worst or a piece of art history at best.
There are certain wall art styles that seem to beat all the odds and endure for years and years, never going out of fashion and always able to add a little style to any given room. One such category is rather broad but has lasted as a result of that.
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Contemporary canvas art is a broad category because experts have chosen to put so many styles together under it as an umbrella heading, but this has ensured that it remains relevant for decades at a time.
For example, contemporary art like pop art existed in previous decades but has evolved to incorporate minimalist styles and forms as well as realism, abstract and various other movements in history.
Artists from one generation have literally taken what the previous generation had to offer and ensured that it evolved to make it relevant in their particular time.
No matter what your generation, you can identify with a number of styles and forms as a result, tracing them through the ages and easily becoming fascinated by the historical significance the art has to offer.