Mount Stuart, Isle of Bute. Mount Stuart is an incredible Gothic palace in red stone. Created by the 3rd Marquess of Bute from the ashes of an earlier house on the site, it was was begun in 1879 and remained "work in progress" on his untimely death in 1900. The 3rd Marquess has been described as a compulsive builder, responsible for buildings as varied as Cardiff Castle and the restored Falkland Palace, and it is tempting to suspect he saw Mount Stuart as a hobby almost as much as he saw it as a