Lady Diana Spencer's wedding dress was an ivory silk taffeta and antique lace gown, with a 25-foot (7.62 m) train and a 153-yard tulle veil, valued then at £9,000 (). It was worn at Diana's wedding to Charles, Prince of Wales in 1981 at St Paul's Cathedral. It became one of the most famous dresses in the world, and was considered one of the most closely guarded secrets in fashion history.