Ammon News - On November 24, 1602, the eve of St. Catherine’s Day, Spanish explorer Sebastián Vizcaíno sighted three islands. He renamed Pimu, the largest island, Santa Catalina. Pimu—so-called by its native inhabitants, the Pimungan (or Pimuvit) people, was first discovered by Spaniards in October 1542 who claimed the island for their king.