Two traditions, one carved and one channelled, give Puerto Rican religion its distinctive interior. The santos de palo are small wooden saints carved by santeros, artisan dynasties whose work fills island museums and family altars alike. The favourite subjects tell their own theology: the Three Kings, patrons of the island's beloved January feast, above all the black king Melchor; the Virgin of Monserrate with her dark face; the hand of God; and the Anima Sola, the lone soul in purgatory's flames. A household santo was a working member of the family, prayed to for rain, health and safe childbirth and sometimes turned to face the wall when a request went unanswered, and the promesa, the vow that repays a favour with pilgrimage, rosaries or a child's habit, remains a living institution. Espiritismo arrived in the 1850s and 1860s as the fashionable science of Allan Kardec's books, carried home by students from Europe, and the island's intellectuals founded centres that made it a genuine social movement.
At the popular level it fused with Catholic sacramentals and African inheritances into Mesa Blanca practice, the white table set with water, flowers and candles where mediums work causas, the spiritual causes of affliction, and the botanica, stocked with herbs, oils, statues and Kardec's texts, became its pharmacy. Clergy of every stripe have denounced the blend for a century and a half; it persists serenely, in San Juan and in the diaspora.