People gathered in front of the Greek Parliament

[UNVERIFIED CONTENT] People taking pictures of Greek Evzones in summer service uniform changing guards at the tomb of the unknown soldier on 10 August 2013 in Athens, Greece.The Evzones, or Evzoni, is the name of several historical elite light infantry and mountain units of the Greek Army. Today, it refers to the members of the Presidential Guard , an elite ceremonial unit that guards the Greek Tomb of the Unknown Soldier , the Presidential Mansion and the gate of Evzones camp in Athens. The Evzones are also known, colloquially, as Tsoliades.Evzones on duty perform their movements in a very slow and highly stylized manner. They switch positions with each other every fifteen minutes and remain completely motionless and at attention in the meantime. Since the Guards are required to be totally still at all times, there is one Evzone in normal fatigues uniform and police surveillance to ensure that no one approaches or harasses the Guards while on duty. The 'little changes' take place every hour on the hour, and involve the two incoming and two outgoing sentries, and a supervising 'Corporal of the Change'. The Grand Change takes place at 11 am on Sunday mornings, and involves the whole Guard with its officers and a military band, all marching from the Guard Barracks to the Tomb for the Change, and back. The Grand Change is a popular Sunday morning spectacle for Athenians and tourists alike.