Cyrus cylinder guarantor of the Shah.

Each cylinder is a parfait of time.

And another story of the cylinder begins.

They want to borrow the Cyrus cylinder.

The piston does not come into contact with the cylinder cover.

What happened next was remarkable, and it's where our cylinder enters the story.

And last year, the Cyrus cylinder went to Tehran for the second time.

The identifiers have mainly been used by customs officers to verify cylinder contents.

When he has his great celebrations in Persepolis, he summons the cylinder and the cylinder is lent by the British Museum, goes to Tehran, and is part of those great celebrations of the Pahlavi dynasty.

He's a slave.

Because the cylinder account and the Hebrew Bible account differ in one key respect.

40 years on and we're in 1917, and the cylinder enters a different world.

And usually we'll have a slightly larger cylinder mounted exterior on the rebreather, like this.

The Babylonian cylinder is written by the priests of the great god of Bablyon, Marduk.

So someone came up with a very clever idea, to instead of heating the whole cylinder and cooling the whole cylinder, what about if you put a displacer inside a little thing that shuttles the air back and forth.

It's just a small cylinder down here which holds the generator inside and all the linkage and it's the hot cap the hot cylinder on the top this part gets hot, this part is cool, and electricity comes out.

The freeing of a slave!

The freeing of a slave!

The freeing of a slave,

The freeing of a slave,

The freeing of a slave.

The freeing of a slave.

A slave when he prayeth?

A slave when he prayeth?

So the main tank, the main critical thing, is this oxygen gas supply cylinder we have here.

He treats me like his slave.

A man chooses a slave obeys.

This person is your slave, right?

Tom treated Mary like a slave.

(It is) to free a slave,

(It is) to free a slave,

For example, that a two cylinder gas engine was used in a car with a single balancer shaft.

The Slave Ethos and the African Economy

(It is) Freeing a neck (slave, etc.)

(It is) Freeing a neck (slave, etc.)

It is the freeing of a slave,

It is the freeing of a slave,

(It is) the freeing of a slave,

(It is) the freeing of a slave,

It is the freeing of a slave

It is the freeing of a slave

It is the freeing of a slave

It is the freeing of a slave

A clay cylinder covered in Akkadian cuneiform script, damaged and broken, the Cyrus Cylinder is a powerful symbol of religious tolerance and multi culturalism. In this enthralling talk Neil MacGregor, Director of the British Museum, traces 2600 years of Middle Eastern history through this single object.

And it's the subject of a huge debate about what this cylinder means, what Cyrus means, but above all, Cyrus as articulated through this cylinder Cyrus as the defender of the homeland, the champion, of course, of Iranian identity and of the Iranian peoples, tolerant of all faiths.