Arkhangelsk Oblast eventually spread well beyond the Arkhangelsk Region. The Mezen horses, bred in the Mezen River valley, are rather small but suitable for difficult work and easily survive cold winters. The area of current Arkhangelsk Oblast has always been located on the trading routes connecting central Russia to the White Sea, and, in fact, in the 17th century the White Sea was the main sea export route for Russia. The whole course of the Northern Dvina is navigable, as well as the lower course of some of its tributaries, most notably the Vychegda, the Vaga, and the Pinega. The Mezen is
Arkhangelsk never reached it as the German forces failed to capture either of the two cities and also failed to capture Moscow. Arkhangelsk was also the site of Arkhangelsk ITL, or the Arkhangelsk Labour Camp, in the 1930s and 1940s. Today, Arkhangelsk remains a major seaport, now open year-round due to improvements in icebreakers. The city is primarily a center for the timber and fishing industries. On March 16, 2004, fifty-eight people were killed in an explosion at an apartment block in the city. Arkhangelsk is the administrative center of the oblast and, within the framework of administrative divisions, it also