More on Long Walls from Fact Monster:

• Piraiévs - Piraiévs Piraiévs or Piraeus, city (1991 pop. 182,671), E central Greece, in Attica, ...
• long-wall mining - long-wall mining: long-wall mining: see coal mining.
• Athens, city, Greece - Athens Athens , Gr. Athínai, city (1991 pop. 2,907,179; 1991 urban agglomeration pop. ...
• coal mining - coal mining coal mining, physical extraction of coal resources to yield coal; also, the business of ...
• Athens, city, Greece: History - History The cultural legacy of ancient Athens to the world is incalculable; to a great extent the ...

See more Encyclopedia articles on: Ancient History, Greece