Answer:
The artist has created unity by suggesting that all the figures are in the same architectural space, which frames them, and also through their gestures and attitudes. They are all actively talking, reading, or meditating. In addition, he has created diversity by employing a significant array of colors, as well as individual and distinctive postures and expressions.
The architectural feature of the Islamic artists that came from the Romans was the horseshoe arch. This is what they liked best in Roman culture, so they decided to use it in their art and architecture as well. Islamic architecture is quite different from any other, although it was certainly influenced by many other world architectures.
