فابيان
Casével's only church, to the invocation of São João Baptista dates back to the 14th century, and was repaired several times, including in 1533 and again in 1940-1950 after it had been abandoned. During the course of its restoration, layers of debris were removed to reveal a gold-leaf altar, with various saints of which little is known, and golden silver ornaments, including the "Reliquary-Head of Saint Fabian" and two monstrance, dating back to the 16th Century. The "Head", fabricated from the 13th Century, is a unique item: it is a sculpture in silver, containing the human skull of Pope Fabian, a Christian martyr. Legend has it that this relic arrived in Portugal in the possession of Princess Vataça Lascaris, and today is (and on exhibition at the Royal Treasury in the Basilica of Castro Verde).