This venerable parish church, now the Basilica of Our Lady of Guanajuato, was begun in 1671 and completed in 1696. It is one of the finest examples of seventeenth century mannerist-baroque architecture. In its interior, one can admire the antique figure of the Virgin, patron of Guanajuato, which was a gift from King Charles I and his son, Phillip II, of Spain.