ich , ▁and ▁Rol ling er grund ▁ ▁incorpor ated ▁into ▁city . ▁ ▁Villa ▁Lou v igny ▁built . ▁▁ 1 9 2 1 ▁- ▁Gast on ▁D ider ich ▁becomes ▁mayor . ▁▁ 1 9 2 3 ▁- ▁G ël le ▁Fra ▁war ▁mem orial ▁ere cted . ▁▁ 1 9 3 0 s ▁- ▁Sand we iler ▁Airport ▁opens . ▁▁ 1 9 3 3 ▁- ▁Luxemb ourg ▁Phil harm onic ▁Orchestra ▁founded . ▁▁ 1 9 4 0 ▁ ▁May ▁ 1 0 : ▁German ▁occupation ▁begins . ▁ ▁August ▁ 1 8 : ▁Volks deutsch e ▁Bew egung ▁r ally ▁held . ▁▁ 1 9 4 4 ▁ ▁September ▁ 1 0 : ▁German ▁occupation ▁ends . ▁ ▁Luxemb ourg ▁American ▁C emetery ▁and ▁Memorial ▁established . ▁ ▁December : ▁City ▁bes ie ged ▁by ▁German ▁V - 3 ▁can non . ▁▁ 1 9 4 5 ▁- ▁January : ▁City ▁bes ie ged ▁by ▁German ▁V - 3 ▁can non . ▁▁ 1 9 4 6 ▁- ▁É mile ▁H amil ius ▁becomes ▁mayor . ▁▁ 1 9 5 2 ▁- ▁European ▁Co al ▁and ▁Ste el ▁Community , ▁European ▁Commission , ▁and ▁European ▁Court ▁of ▁Justice ▁head qu arter ed ▁in ▁city . ▁▁ 1 9 5 3 ▁- ▁European ▁School ▁of ▁Luxemb ourg ▁I ▁established . ▁▁ 1 9 6 4 ▁- ▁Municipal ▁Theatre ▁built . ▁▁ 1 9 6 5 ▁- ▁Al cide ▁de ▁Gas per i ▁Building ▁constructed . ▁▁ 1 9 6