In 1529, the Ottomans devastated Mödling for the first time during their first siege of Vienna. In 1679, many citizens died of the Black Death. When the Ottomans came again in 1683, almost all the citizens of Mödling were killed. The second epidemic of the Black Death only brought death to 22 inhabitants, hence the survivors built the monument of the Holy Trinity (Dreifaltigkeits- or Pestsäule) at the Freiheitsplatz.