References 857% CONFIDENCEOverall confidence: 57%How well the pin's source and references back up its dates.Weighted average of how firmly 8 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidence
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]50%youtube.com/watch?v=qje-UxxxZ5cyoutube.com· Posted Sep 15, 2026· Starts Jan 1, 1821 ✓· 12% of score
Fondazione Henraux[8] and Quarry Magazine[7] both date the company's founding to 1821, but neither source gives a specific month or day.
- [2]50%Managing a Marble Quarry | Stone Men | FD Engineeringyoutube.com· Added Sep 15, 2026· 13% of score
Uomini di Pietra episode set at Henraux’s Monte Altissimo marble quarry, the same real-world company/site as this pin.[1]
- [3]50%Fighting the Mountain for Precious Marble | Stone Men | FD Engineeringyoutube.com· Added Sep 15, 2026· 13% of score
Uomini di Pietra episode set at Henraux’s Monte Altissimo marble quarry, the same real-world company/site as this pin.[1]
- [4]50%Heavy Machines at Work: How Marble is Mined | Stone Men | FD Engineeringyoutube.com· Added Sep 15, 2026· 13% of score
Uomini di Pietra episode set at Henraux’s Monte Altissimo marble quarry, the same real-world company/site as this pin.[1]
- [5]50%How to Move a 700 Tonne Marble Block | Stone Men | FD Engineeringyoutube.com· Added Sep 15, 2026· 13% of score
Uomini di Pietra episode set at Henraux’s Monte Altissimo marble quarry, the same real-world company/site as this pin.[1]
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