Ottoman politician Tabaniyassi (“Flat-Footed”) Mehmed Pasha was executed by drowning on this date in 1637, having fallen foul of the tyrannous Sultan Murat IV.
It hadn’t been long since Mehmed Pasha (English Wikipedia entry | Turkish) was the one inflicting the sultan’s chastisements instead of receiving them; he was appointed Grand Vizier in 1632 to crush a Janissary revolt* in Egypt, and did so with brutal aplomb.
His career thereafter saw him carry Turkish arms to Persia and Armenia, and bully client princes in the Porte’s European sphere. Murat eventually grew suspicious that his aide might be conspiring against him and had him imprisoned at the capital’s imposing Yedikule Fortress.
* The sultan had reason to fear these mercurial praetorians; he had the throne thanks to that same clique’s 1622 murder of a predecessor.