Extensive medieval tunnel system carved through marlstone near Maastricht. Part of a 15-mile network of underground passageways running between the Netherlands and Belgium, containing Templar-associated symbols matching those found on Oak Island.
About This Site
The Caestert stone quarry is a 12th-century underground tunnel system near Maastricht in the southern Netherlands, where marlstone was mined for the construction of Catholic churches and abbeys throughout the region. The quarry comprises thousands of tunnels totaling approximately 15 miles of underground passageways that extend beneath the border between the Netherlands and Belgium. Used continuously from the medieval period through the 18th century, the tunnels contain carved symbols, drawings, and inscriptions left by miners, pilgrims, and, according to some researchers, members of the Knights Templar who may have used the quarry network as a staging area or hiding place for treasures during the suppression of the order in the early 14th century.
Connection to Oak Island
In Season 11, Corjan Mol and cultural historian Jacquo Silvertant led Rick Lagina, Doug Crowell, Alex Lagina, and Peter Fornetti through the quarry as part of a European research trip. Jacquo proposed that the Templars may have hidden their treasures in the quarry network before transporting them onward to Oak Island. In a cross-shaped section of the tunnels, the team found drawings resembling a menorah alongside four-dot crosses and circles with a central dot, both matching symbols found on the H/O stone from Oak Island's northern shore.
Corjan suggested that the recurring appearance of these symbols across multiple European sites, from Caestert to Morimondo Abbey to the churches of Bornholm, may trace the route the treasure followed as it moved westward toward the Atlantic. The quarry's position near major medieval trade routes connecting the Rhineland to the North Sea ports of Flanders would have made it a logical waypoint in any such journey.
Fieldwork Notes
Visited during Season 11 by Rick Lagina, Doug Crowell, Alex Lagina, and Peter Fornetti, guided by Corjan Mol and cultural historian Jacquo Silvertant. The team documented menorah drawings, four-dot crosses, and circle-with-dot symbols in a cross-shaped section of the tunnel network.
