The Cyrus Cylinder came from ancient Persia. Now the British Museum, where it has been housed for many years, is loaning the artifact to the museum in Tehran, Iran.
Todd Bolen calls attention the the agreement, the historical significance of the Cyrus Cylinder, and the biblical reference (Ezra 1:1-4) to one of the events mentioned in the Cylinder.
The the account at the Bible Places Blog here, and be sure to follow the link to his list of the British Museum: Top 10, yeah 15.
If you plan to visit London, and you are interested in Bible study, be sure to download my short list of “Some Biblically Related Artifacts in the British Museum” here.