The scene with the two large groups of figures in costumes 

This is a typical example of Nicholas Roerich's artistic style, known for its symbolic and mystical themes. The artwork depicts two groups of figures, likely representing different cultures or factions, engaged in a dialogue. The figures are adorned in elaborate costumes, rich in detail and intricate patterns, showcasing the artist's attention to historical accuracy. Roerich's works often explored themes of spirituality, cultural exchange, and the quest for enlightenment, making this piece an intriguing example of his artistic vision.