The Kalmar Bloodbath, sometimes described as the Second Kalmar Bloodbath to distinguish it from an earlier massacre in the same place, was the public mass execution of 22 men in Kalmar, Sweden, on 16 May 1599. All of the victims were members of the garrison from Kalmar Castle, and included three noblemen and a priest, all four of whom were beheaded. The other eighteen victims, comprising secretaries, garrison officers and mercenary commanders, were all hanged.