The Constitution of Greece (Greek: Σύνταγμα της Ελλάδας, romanized: Syntagma tis Elladas) was created by the Fifth Revisionary Parliament of the Hellenes in 1974,[1][2] after the fall of the Greek military junta and the start of the Third Hellenic Republic.

Syntagma Square (Plateia Syntagmatos) in Athens is named after the first constitution adopted in the modern Greek State.

Parliament has the right to revise or amend the Constitution, except for the articles dealing with the "Form of the State" (the establishment of the presidential, parliamentary republic) and the articles safeguarding human rights and freedoms, which are unalterable.

In this case, the business of revision is transferred to the next term of Parliament, i.e., after the following legislative elections.

If the initial motion for revision only achieved a 50% plus one majority, then a three fifths supermajority of the new Parliament is required.