Pewter is a metal alloy that can be found in the grout of stained-glass windows from the 18th century, and it is part of the antidote to stop Aphrodite. Grout is the binding material used to hold the pieces of glass together.
Scooby-Doo! Mystery Incorporated
However, it was all part of Pericles's scheme to visit places that would also lead him to cursed treasure, with the church containing a document, which Pericles stole without Scooby noticing.