Mstislav III Glebovich

Mstislav III Glebovich (before 1215/1220 – after October 18, 1239) was an Olgovichi prince.

[1] During his reign, the Tatars (the Mongols) invaded and pillaged the towns of the Principality of Chernigov.

[1] By 1225, Mstislav had already been second in seniority among the Olgovichi (the ruling dynasty of Chernigov), and therefore during the absence of his cousin, Mikhail Vsevolodovich, he commanded them.

[1] On April 6, 1231, he attended a snem (a meeting of some leading princes of Rus’ organized by Grand Prince Vladimir III of Kiev) in Kiev, but the reasons for convoking the council are not given.

[1] It appears that his domain probably lay west of the Snov and Desna rivers.