[2] In 1427, the prince of Pronsk, Ivan Vladimirovich, went into Lithuanian service.

[3][4] The Pronsk principality was annexed to the Ryazan principality in 1483 during the regency of Anna of Ryazan, following frequent visits to her brother Ivan III in Moscow and with his agreement.

Alexander recognized Ivan III's conquests,[7] and his control of lands including Moscow, Novgorod, Ryazan, Pskov, Pronsk, and others, while Chernigov, Starodub, and 17 other cities were ceded to Moscow.

The treaty was signed in the name of Ivan III, sovereign of all Russia, his son Vasily II, and the rest of his children.

[8][9] From 1129, the princes of Pronsk descended from the Sviatoslavichi branch of Rurikids in Chernigov:[10]