Free admission on the following days:
- Every first Sunday of the month from November 1 to March 31
- On National Day, October 28
- On anniversaries or international congresses
- April 18 (International Day for Monuments)
- May 18 (International Museum Day)
- The two-day European Heritage Days (last weekend in September each year)
- March 6 (Memorial Day for Melina Mercouri)
