Giovanni Costanzi (1674–1754) was an Italian gem engraver of the late-Baroque period.

He was the head of a family of gem-makers and artists in Naples. His sons Carlo and Tommaso were also a gem engravers, while his other son Placido became a painter. Giovanni later moved and worked the rest of his life in Rome. One of his commissions was for Frederick the Great.[1]

References

  1. ↑ "Giovanni Costanzi Brief Biography". Retrieved 2012-07-17.
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