Look at any painting of Cassandra. Evelyn De Morgan’s 1898 masterpiece — her arms extended, Troy burning behind her, the Trojan Horse visible through the smoke. The ancient Greek pottery. The Roman murals. The book cover of Emily Pillinger’s scholarly study, Cassandra and the Poetics of Prophecy: Cassandra reclining, the city alight in the background, a red garment draped from the pillar above her. There is almost always a red cloth. A red veil. A red scarf.