Svyatoslav Mstislavich of Novgorod was born circa 1180 to Mstislav III Romanovich of Kiev (c1160-1223) and died 1238 of unspecified causes.
Svyatoslav (baptized Semyon) Mstislavich - Prince of Novgorod (August 1, 1217 - 1218 [1]), Prince of Polotsk {1222-1232), Prince of Smolensk (1232—c1238 [2] [3] ). Son of Mstislav Romanovich the Elder.
It is possible that after 1222, when Smolensk took Polotsk, Svyatoslav became prince of Polotsk. In 1230, after Mstislav Davydovich's death, the throne of the Principality of Smolensk was supposed to be taken by Svyatoslav, but for some reason the people of Smolensk did not want to have him as their prince. Then, in 1232, Svyatoslav with the help of the Polovtsians took the throne of the Principality of Smolensk by force "on the shield,es and sat
During the Mongol invasion of Russia in March 1238, the main part of the Mongolian forces passed through the area of Dolgomostye 30 km. east of Smolensk, and the literary work "Life of Saint Mercury of Smolensk" describes the defeat of the Mongolian army.
The position of Svyatoslav (or his successor) is not clear.
Siblings
| Name | Birth | Death | Joined with |
| Svyatoslav Mstislavich of Novgorod (c1180-c1238) | 1180 | 1238 | |
| Vsevolod Mstislavich of Smolensk (c1185-1249) | 1185 | 1248 | |
| Mariya Mstislavna of Smolensk (c1187-1220) | 1180 | 24 January 1221 | Konstantin Vsevolodovich of Rostov (1186-1218) |
| NN Mstislavna of Smolensk (c1190-c1240) | |||
Residences
Footnotes (including sources)