I was just reading that, according to the 13th-century chronicler Rodrigo Jimenez de Rada, the bishopric of Palencia, lost during the Muslim conquest, was refounded by King Sancho el Mayor of Navarre in the 11th century after a miraculous experience. He was hunting in the woods that covered the once prosperous Roman and Visigothic city and chased a boar into what appeared to be a cave. When he raised his arm to strike it with his lance, his arm became paralyzed. He had committed sacrilege, brandishing a weapon near the altar of the tomb of St. Antoninus. He only recovered when he promised to build a church on the site. That church would become the Cathedral of Palencia.
Cathedral of Palencia -- late gothic, not the one Sancho built.
None of the 11th-century documents refer to this legend, and although there was a Visigothic crypt on the site, it probably did not contain the relics of St. Antoninus, since the cult of that 4th-century Syrian martyr was not brought to Spain until the 11th-century. Now however the story of the boar is represented in Renaissance carvings next to the stairway that leads down to the crypt. Today is the feast day of another St. Antoninus. Happy feast of St. Antoninus.