Соловецкие острова
On July 15, 1929 the All-Russian Central Executive Committee issued a decree splitting Northern Krai (with the exception of the Komi-Zyryan Autonomous Oblast, which remain as a single unit with the seat in Ust-Sysolsk, and the islands of Vaygach, Kolguev, Matveyev, Novaya Zemlya, Solovetsky Islands, and Franz Josef Land) into five administrative districts ("okrugs")