500-Year-Old Polish Crypt Yields Unique Tar-Sealed Coffins

Archaeologists in Poland found a secret room, called a crypt, hidden under an old church.

It took them over a month to dig a tunnel to get inside!

Inside, they found six coffins stacked in three different levels.

What's really strange is that the coffins were covered in a special mix of tar and cloth, like a sealant.

They think this was to keep the coffins safe, especially because burials were sometimes delayed.

One coffin had metal poles around it, which makes them think that person was very important.

This church and the rooms underneath were built about 500 years ago, but the burials happened later.

Now that they've taken the remains to study them, the crypt will be opened for everyone to see.