In 1578, twenty-four-year-old King Sebastian I of Portugal launched a disastrous crusade in Morocco, culminating in the Battle of Alc! cer Quibir. Sebastian's body was never definitively identified on the battlefield, leaving a power vacuum that allowed Philip II of Spain to claim the Portuguese crown.
Devastated and desperate, the Portuguese public embraced a messianic belief called Sebastianism—the conviction that the young monarch was merely hiding and would eventually return to liberate his nation. This fervent myth created an opportunity for charismatic imposters over the next two decades. The first pretender appeared in 1584: a tile-maker's son known as the King of Penamacor who gathered loyal followers before being captured.
In 1585, Mateus Alves, a hermit priest, declared himself Sebastian and raised an armed rebellion in Ericeira. A decade later, a Spanish pastry chef named Gabriel de Espinosa posed as the king with the backing of a royal insider, leading to his execution in 1595. The most convincing pretender was Marco Tulio Catizone, an Italian who emerged in Venice in 1598, speaking no Portuguese yet reciting intimate details of royal court life.
Though all four were eventually exposed and punished, the legend of Sebastian continued to shape Portuguese political identity for centuries.