Events commemorating the 37th anniversary of a students' uprising at the Athens Polytechnic that led to the collapse off the seven-year dictatorship in Greece began on Monday with the opening to the public of the Polytechnic's gates in downtown Athens.
Events will climax on Wednesday with an annual street march through Athens that will conclude in front of the American Embassy.
Until Wednesday, the Polytechnic's gates will be open from 9.30 a.m. to 9 p.m. for the laying for wreaths by organisations and individuals. The Polytechnic Senate will be on constant session through Thursday.
Approximately 7,000 police officers will be patrolling the city of Athens to prevent violent incidents.