An underwater city inspired by Islamic architecture and art. The city should feature intricate mosques, madrasas, and palaces made of iridescent mother-of-pearl and turquoise tiles, with delicate calligraphy and geometric patterns. A magnificent underwater masjid should rise in the center, shimmering with soft light. Blend Islamic art and culture with oceanic colors and life, conveying peace, serenity, and awe-inspiring beauty.