The Metaxas Line was a chain of fortifications here are views from a lay-out cutaway view constructed along the line of the Greco-Bulgarian border; designed to protect Greece in case of a Bulgarian invasion The Metaxas Line consists of 21 independent fortification complexes; the largest of which is Fort Roupel as it covers 6.1 out of the 155蔾m of the full line and had been constructed at a height of 322 m. The fortification works lasted four years and their cost at the time reached 100;400;000 drachmas.IN THE PHOTO #5-amunitions supply#6-8-internal electric generatorsPOLEMIKON MUSEUM