A clay seal stamped with Hezekiah’s name was found recently (actually, it was excavated in 2009, but its significance was just recently discovered). This royal seal, that would be impressed upon scrolls, is over 2,700 years old. It clearly has the imprint of Hezekiah’s name upon it, measuring only about a centimeter across. Bible History Daily reports that:
The bulla, which measures just over a centimeter in diameter, bears a seal impression depicting a two-winged sun disk flanked by ankh symbols and containing a Hebrew inscription that reads “Belonging to Hezekiah, (son of) Ahaz, king of Judah.” The bulla was discovered along with 33 other stamped bullae during wet-sifting of dirt from a refuse dump located next to a 10th-century B.C.E. royal building in the Ophel.
In the ancient Near East, clay bullae were used to secure the strings tied around rolled-up documents. The bullae were made by pressing a seal onto a wet lump of clay. The stamped bulla served as both a signature and as a means of ensuring the authenticity of the documents.
“Biblical King’s Royal Seal Unearthed in Jerusalem” by Tia Ghose | CBS News Dec 2, 2015
“Seal Bearing the Name of Judean King Found in Jerusalam” by Ilan Zion | The Time of Israel.
“King Hezekiah in the Bible” by Robin Ngo | Bible History Daily
“A Mark of Power!” by Richard Gray | Dailymail.com
Here is a short video of the archaeologist, Dr. Eilat Mazar, on the discovery:
Daily Mail has a good video description of the bulla:
King Hezekiah’s Seal Impression Found in the Ophel Excavations, Jerusalem: