Administrative divisions of the Novgorod Republic
The administrative division of Novgorod Republic is not definitely known; the country was divided into several "tysyachas" (lit. thousands) and "volosts". The city of Novgorod with its vicinity, as well as a few other towns were not part of any of those. Pskov achieved an autonomy from Novgorod in the 13th century; its independence was confirmed by the Treaty of Bolotovo in 1348. After the fall of the republic, Novgorod Land, as part of Russia, consisted of 5 "pyatinas" (literally "fifths") that were further divided into uyezds and pogosts. This division was replaced only  in the beginning of 18th century when Peter I introduced guberniyas. Novgorod Republic. Core. Northwestern Russia – the lands near Ilmen Lake, Volkhov River, Ladoga Lake and Gulf of Finland, often referred to as "Novgorod volost" in chronicles, formed the core of the state. The assumptions of the internal structure of independent Novgorod are mostly based on the list of the builders of the Great Bridge over Volkhov (1260s) and the 1471 treaty between Novgorod and Casimir IV of Poland. The former lists ten parts of Novgorod itself and nine other entities. According to Burov, these were tysyachas that, together with  the capital made "t'ma" (lit. ten thousand), mentioned in the 1471 treaty. Below is the list of tysyachas and their approximate locations: Novgorod with its vicinity (located on upper Volkhov and near Ilmen Lake) belonged to a separate territorial unit. Other important towns were Porkhov, Koporye, Yama, Oreshek and Korela. Most of the towns were in the more economically developed western part of the country, in other parts only "ryadki" (small town-like settlements) existed or there were no town-like settlements at all. Several towns were also not part of any tysyacha (and, thus, of t'ma) as they were  owned jointly by Novgorod and one of the neighbouring states. Velikiye Luki were owned jointly by Novgorod and Smolensk Principality and later by Novgorod and Lithuania. Volokolamsk and Torzhok were owned by Novgorod and Vladimir-Suzdal Principality that became part of Muscowy. Volosts. Vast lands to the east that were being colonised by Novgorod or just paid tribute to it were divided into volosts. Some of those volosts were: Pskov. After the disintegration of Kievan Rus in the 12th century, the city of Pskov with its surrounding territories along the Velikaya River, Lake Peipus, Pskovskoye Lake and Narva River became  a part of the Novgorod Republic. It kept its special autonomous rights, including the right for independent construction of suburbs (Izborsk is the most ancient among them). Due to Pskov's leading role in the struggle against the Livonian Order, its influence spread significantly. The long reign of Daumantas (1266–99) and especially his victory in the Battle of Rakovor (1268) ushered in the period of Pskov's actual independence. The Novgorod boyars formally recognized Pskov's independence in the Treaty of Bolotovo (1348), relinquishing their right to appoint the posadniks of Pskov. The city of Pskov remained dependent on Novgorod  only in ecclesiastical matters until 1589, when a separate bishopric of Pskov was created and the archbishops of Novgorod dropped Pskov from their title and were created "Archbishops of Novgorod the Great and Velikie Luki". Pyatinas. After the conquest of Novgorod Land by Muscowy it was divided into 5 pyatinas (fifths):