Lakarian City was a major city on Cardassia Prime. Its leisure facilities included an amusement center - one which Gul Dukat had been planning to take his son, Mekor, to for his eleventh birthday. (DS9: "Defiant")
In 2375, following the Cardassian Rebellion's sabotage of the planet's power systems, the city was leveled by Jem'Hadar troops, on the order of the Founder in command on the planet. All two million inhabitants were killed. This action provoked the defection of the Cardassian military, and a planetary revolt, ultimately turning the tide of the Battle of Cardassia. (DS9: "What You Leave Behind")