A formidable Byzantine empress from a fictional Eastern Roman empire stands in her imperial marble courtyard at high noon, wearing elaborate purple and gold silk robes with Byzantine cross embroidery and gem-encrusted stemma crown, her dark hair adorned with pearl strands and gold threads, holding a golden scepter topped with a ruby, commanding dignified expression, dramatic harsh Mediterranean sunlight casting sharp shadows against pristine white marble columns, rich details of cascading fountains and intricate mosaics depicting mythological scenes, oil painting texture with digital precision, powerful regal three-quarter composition against azure sky and distant purple mountains, 4k hyperdetailed digital art