4 ms·

> ground level then was a few metres lower than now What?! That's huge. What happened?

gassi 11mo ago
Before industrial demolition was common, old buildings would be town down and material repurposed for new constructions, build on top of existing foundations and rubble. Do this enough over the centuries and your city will slowly rise in height.
- mr_toad 11mo ago
  If anyone’s ever in Barcelona I recommend checking out the history museum, which is literally built on top of some Roman and medieval ruins. You can descend into the basement to see the excavated remains of the foundations of Roman buildings that had been levelled and built on top of.
trenchpilgrim 11mo ago
Every time a building fell apart due to earthquake, fire, flood, war, abandonment- the good material was taken for reuse and the bad material became rubble which was often smoothed out and used as a foundation.
feurio 11mo ago
Shoes. All the way down. ;-)
- dboreham 11mo ago
  Takes me back. I don't think we have the number of shoe shops that used to dominate the high street and at the time I assumed inspired Adams.
shagie 11mo ago
Seattle: https://undergroundtour.com https://undergroundtour.com Buried ships of San Francisco - https://www.nps.gov/safr/learn/historyculture/buried-ships-of-san-francisco.htm https://www.nps.gov/safr/learn/historyculture/buried-ships-o... https://www.baylightscharters.com/bay-lights-charters-blog/what-lies-beneath-the-ships-buried-under-san-francisco https://www.baylightscharters.com/bay-lights-charters-blog/w... > Delgado received his first big assignment back in 1978 while working for the National Park Service: excavating and studying the remains of the Niantic, one of the first whaling vessels that brought gold-seekers to the area. It had been discovered near the Transamerica Pyramid at the corner of Clay and Sansome streets. After being left behind during the Gold Rush, the ship had been repurposed to serve as a storeship, saloon, and hotel until its demise in an 1851 fire. Consider that https://maps.app.goo.gl/tYjaESQXss2KhHXQA https://maps.app.goo.gl/tYjaESQXss2KhHXQA used to be sea level. As mentioned else comment, things were torn down and that served as the foundation for the next building.
pmontra 11mo ago
If you leave ground alone all sort of things grow on it or lay on it. Dirt, mud, leaves etc. Soil grows at about 1 mm per year. 1 meter in 1000 years. Historically cities were hit by floods and wars and new buildings were built on top of the foundations of old ones. We had an article about that church in Rome built over another roman church built over another roman church, etc. down to an old temple on a spring, or something like that.
- asdff 11mo ago
  It might even happen faster than that. If I don't sweep my cement patio for about a month, the decaying leaves from the bushes are enough to make about an 1/8th inch of fresh brown soil under the leaf piles.
  - pmontra 11mo ago
    Exactly. This is hard to understand when living in a flat in a modern city but it's immediately clear in any other case. My figure of 1 mm is about the compacted result of decaying and layering. It may vary a lot according to the configuration of the ground.
- clan 11mo ago
  Sounds like Basilica of San Clemente[1][2]. One of the many many many "hidden" gems of Rome. Highly recommend visiting it! Or you can go on a virtual tour[3] [1] https://www.basilicasanclemente.com/eng/ https://www.basilicasanclemente.com/eng/ [2] https://maps.app.goo.gl/zpXpQuxQLUvE5TLA9 https://maps.app.goo.gl/zpXpQuxQLUvE5TLA9 [3] https://www.basilicasanclemente.com/eng/a-virtual-tour/ https://www.basilicasanclemente.com/eng/a-virtual-tour/
  - pmontra 11mo ago
    Thanks! And this is the article I remember https://www.exurbe.com/the-shape-of-rome/ https://www.exurbe.com/the-shape-of-rome/
- tom_alexander 11mo ago
deleted 11mo ago
[deleted]
qingcharles 11mo ago
Tons of cities have hidden underground streets that are the old street level and now abandoned due to all manner of modernization. Walking around Chicago I often see houses where the front door is a couple of meters below street level because the house never moved its door to an upper story when the city was releveled.

gassi 11mo ago

Before industrial demolition was common, old buildings would be town down and material repurposed for new constructions, build on top of existing foundations and rubble. Do this enough over the centuries and your city will slowly rise in height.

mr_toad 11mo ago
If anyone’s ever in Barcelona I recommend checking out the history museum, which is literally built on top of some Roman and medieval ruins. You can descend into the basement to see the excavated remains of the foundations of Roman buildings that had been levelled and built on top of.

trenchpilgrim 11mo ago

Every time a building fell apart due to earthquake, fire, flood, war, abandonment- the good material was taken for reuse and the bad material became rubble which was often smoothed out and used as a foundation.

feurio 11mo ago

Shoes. All the way down. ;-)

dboreham 11mo ago
Takes me back. I don't think we have the number of shoe shops that used to dominate the high street and at the time I assumed inspired Adams.

shagie 11mo ago

Seattle: https://undergroundtour.com https://undergroundtour.com Buried ships of San Francisco - https://www.nps.gov/safr/learn/historyculture/buried-ships-of-san-francisco.htm https://www.nps.gov/safr/learn/historyculture/buried-ships-o... https://www.baylightscharters.com/bay-lights-charters-blog/what-lies-beneath-the-ships-buried-under-san-francisco https://www.baylightscharters.com/bay-lights-charters-blog/w... > Delgado received his first big assignment back in 1978 while working for the National Park Service: excavating and studying the remains of the Niantic, one of the first whaling vessels that brought gold-seekers to the area. It had been discovered near the Transamerica Pyramid at the corner of Clay and Sansome streets. After being left behind during the Gold Rush, the ship had been repurposed to serve as a storeship, saloon, and hotel until its demise in an 1851 fire. Consider that https://maps.app.goo.gl/tYjaESQXss2KhHXQA https://maps.app.goo.gl/tYjaESQXss2KhHXQA used to be sea level. As mentioned else comment, things were torn down and that served as the foundation for the next building.

pmontra 11mo ago

If you leave ground alone all sort of things grow on it or lay on it. Dirt, mud, leaves etc. Soil grows at about 1 mm per year. 1 meter in 1000 years. Historically cities were hit by floods and wars and new buildings were built on top of the foundations of old ones. We had an article about that church in Rome built over another roman church built over another roman church, etc. down to an old temple on a spring, or something like that.

asdff 11mo ago
It might even happen faster than that. If I don't sweep my cement patio for about a month, the decaying leaves from the bushes are enough to make about an 1/8th inch of fresh brown soil under the leaf piles.
- pmontra 11mo ago
  Exactly. This is hard to understand when living in a flat in a modern city but it's immediately clear in any other case. My figure of 1 mm is about the compacted result of decaying and layering. It may vary a lot according to the configuration of the ground.
clan 11mo ago
Sounds like Basilica of San Clemente[1][2]. One of the many many many "hidden" gems of Rome. Highly recommend visiting it! Or you can go on a virtual tour[3] [1] https://www.basilicasanclemente.com/eng/ https://www.basilicasanclemente.com/eng/ [2] https://maps.app.goo.gl/zpXpQuxQLUvE5TLA9 https://maps.app.goo.gl/zpXpQuxQLUvE5TLA9 [3] https://www.basilicasanclemente.com/eng/a-virtual-tour/ https://www.basilicasanclemente.com/eng/a-virtual-tour/
- pmontra 11mo ago
  Thanks! And this is the article I remember https://www.exurbe.com/the-shape-of-rome/ https://www.exurbe.com/the-shape-of-rome/
tom_alexander 11mo ago

deleted 11mo ago

[deleted]

qingcharles 11mo ago

Tons of cities have hidden underground streets that are the old street level and now abandoned due to all manner of modernization. Walking around Chicago I often see houses where the front door is a couple of meters below street level because the house never moved its door to an upper story when the city was releveled.