Foreign press talks about clashes on an unprecedented scale, at least for the last twenty years in this country.
A protest was held even outside the Greek embassy in London (see photo below).
On this terrible occasion, the 1973 Athens polytechnic uprising is mentioned as the starting point of major rioting in Greece (see Times article on those events).
This article by Malcolm Brabant published on BBC's website explains the link between the two events:
'The polytechnic is the symbol of modern rebellion.
On 17 November 1973, tanks of the then six-year-old military dictatorship burst through the iron railings to suppress a student uprising against the colonels.
The exact casualty figure is still unknown to this day but it is believed that around 40 people were killed.
The sacrifice of the polytechnic was so significant that the post-junta architects of Greece's new constitution drafted the right of asylum, which bans the authorities from entering the grounds of schools and universities.
That is why places of learning are the springboards for the current wave of violence and it also explains why many of the riots are in university towns.
Students and pupils have effectively been given carte blanche to carry on protesting, because their professors have declared a three-day strike.
'Out of control'
Although many of today's protestors were not born when the polytechnic gates were crushed by the tanks, the lesson of the students' martyrdom is a key component of every Greek child's school democracy curriculum.
If Greece had already appeared difficult to govern, it will now be out of control
Nikos Konstandaras, managing
editor of Kathimerini newspaper
The latent Greek contempt for the police, which has now erupted so volcanically, has its roots in the dictatorship, when the police were regarded as the colonels' enforcers and traitors to the people.'
For a sober analysis of the December 2008 events see Professor Kalyvas' presentation at the Woodrow Wilson Center.