The Guslitsa River (Russian: Гу́слица), also known as Guslyanka (Гусля́нка) is a river in Moscow Oblast, Russia. It is a left tributary of the Nerskaya River (Moskva` tributary). It is 36 km in length. Source near the city of Yegoryevsk. Flows all over again on the North, and then on the West, running in the Nerskaya at the village Khoteichi. The upper reaches of the Guslitsa River up to village Ilyinsky Pogost are densely populated and almost without forest. The river has flat type. A feed mainly snow. Guslitsa freezes in November — the beginning of December, it is opened in the end of March — April.
Main tributaries: Desna River, Shuvoyka River, Silenka River.
The city of Yegoryevsk and the villages of Ilyinsky Pogost and Slobodishche are situated on the Guslitsa River.
The river Guslitsa has denominated historical area Guslitsa.
Guslitsa, Guslica, or Guslicy (Russian: Гуслица, Гуслицы) is a region situated in the eastern part of Moscow Oblast. Guslitsa is famous for it was almost entirely inhabited by the Old Believers, mainly popovtsy (Belokrinitskaya Hierarchy, now — Russian Orthodox Old-Rite Church). Name Guslitsa occurs from the Guslitsa River.
Guslitsa is also well known for its cultural heritage and its home-crafts, mainly hand-written singing books and copper mouldings. Guslitsa has its center in the Rudnya and Ilyinsky Pogost villages.
Nowadays Guslitsa lies almost entirely within Orekhovo-Zuyevsky District of Moscow Oblast.
The regions neighboring Guslitsa (currently also unofficial) were also mainly inhabited by the old believers and were influenced by the Guslitsa culture a lot. Among them are: Ramenye, Zakhod, Zaponorye, Patriarshina, Vokhna.