During the “Dekemvriana” (December events), the district of “Asyrmatos” becames scene of conflict between the two combating forces. ELAS is the absolute dominant power in the neighbourhood of Petralona, whereas Thiseion is the place of action of the Organisation X, led by Georgios Grivas. It is a violent clash, leaving part of the district in rubbles. The Hill of the Muses (Philopappos) also becomes battleground. Sometime later, in the first post-war decade, the facilities of the Greek Navy are withdrawn from Ano Petralona and a complex of school buildings is constructed in the area of “Asyrmatos”.
Vougiouka and Megaridis 2009, 59–62, 70.