" Most mosques also feature one or more domes, called qubba in Arabic. While not a ritual requirement like the mihrab, a dome does possess significance within the mosque—as a symbolic representation of the vault of heaven. The interior decoration of a dome often emphasizes this symbolism, using intricate geometric, stellate, or vegetal motifs to create breathtaking patterns meant to awe and inspire. Some mosque types incorporate multiple domes into their architecture , while others only feature one"(https://www.khanacademy.org/humanities/art-islam/beginners-guide-islamic-art/a/introduction-to-mosque-architecture).