In Indianapolis, there is a network of tunnels under the city market building and Tomlinson hall. According to OFV, they were used to store and move products.
Currently only the market building exists, and Tomlinsonhall was destroyed by fire in the late 1950s.
And now only the arch reminds of him.
It is interesting that the building of the market was built since 1821 and opened only in 1886. But the Hall building was built in three years.
The dungeons themselves cover a relatively small area of 20,000 feet, which is approximately 2,000 kV meters. The undergrounds of the Salt Market in Moscow immediately come to mind.
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But the point is, of course, not in size, but in how we perceive these or those historical findings.
Now, if these catacombs were buried, and then excavated, to what era could they be attributed?)))