I’m no expert, but it reminds me of a lot of European early midieval art. The colors , however, seem almost too vivid to be 900 years old. Just my ignorant observation ...
I think I recognize the guy on the right from a Monty Python sketch.
This is what they thought about the Sistine Chapel until it was cleaned. Because they had used candles for lighting, there was soot and other things. The Italian govt spend tens of millions to clean it. Once it was cleaned - they were shocked at the vivid colors. Some people said they ruined it etc. I know it is not 900 years old but some old artwork was suprisingly bright.