Mislav (Latin: Muisclavo) was a duke (Croatian: knez) in Croatia from around 835 until his death around 845.
[2] He is chiefly known for signing a treaty with Pietro Tradonico, Doge of the Venetian Republic in 839, which led to the growth of Croatian sea power.
[4] Duke Mislav maintained good relations with the neighbouring coastal Cities of Byzantine Dalmatia unlike his predecessor, which also led to the growth of Croatian sea power as Mislav modelled Croatian ships in the likehood of the Neretvians and Venetians.
[2] Today, there are 2 known epigraphic inscriptions, mostly altar beams from old Croatian churches (from Donje Biljane and Pridraga), that bear the name of Duke Mislav.
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