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What geotechnical conditions would force the use of crypts or catacombs for burial (vs. sticking coffins in the ground)?

I'm working on the layout of a fairly large crypt/small catacomb (for a RPG dungeon), and I want it to be built out of necessity (thus justifying its size, relatively frequent visitation, and egalatarian usage patterns) as opposed to the more typical case where a crypt or tomb will be built for the burial of wealthy folk (with more money yielding a bigger crypt to spend the afterlife in), while commoners simply get a coffin in the ground.

So what geotechnical conditions or concerns would require the construction of an elaborate, communal burial crypt/catacomb instead of simply sticking the dead in coffins and burying them in a normal way? Furthermore, whatever these conditons are need to be able to support a forest or forest-like ecosystem around it for the living to operate in.

Also, this crypt would be built primarily from stone, with rot-resistant timbering (similar to redwood or cedar) available for key tension members -- it needs to be built to last.

What geotechnical conditions would force the use of crypts for burial (vs. sticking coffins in the ground)?

I'm working on the layout of a fairly large crypt (for a RPG dungeon), and I want it to be built out of necessity (thus justifying its size, relatively frequent visitation, and egalatarian usage patterns) as opposed to the more typical case where a crypt or tomb will be built for the burial of wealthy folk (with more money yielding a bigger crypt to spend the afterlife in), while commoners simply get a coffin in the ground.

So what geotechnical conditions or concerns would require the construction of an elaborate, communal burial crypt instead of simply sticking the dead in coffins and burying them in a normal way? Furthermore, whatever these conditons are need to be able to support a forest or forest-like ecosystem around it for the living to operate in.

Also, this crypt would be built primarily from stone, with rot-resistant timbering (similar to redwood or cedar) available for key tension members -- it needs to be built to last.

What geotechnical conditions would force the use of crypts or catacombs for burial (vs. sticking coffins in the ground)?

I'm working on the layout of a fairly large crypt/small catacomb (for a RPG dungeon), and I want it to be built out of necessity (thus justifying its size, relatively frequent visitation, and egalatarian usage patterns) as opposed to the more typical case where a crypt or tomb will be built for the burial of wealthy folk (with more money yielding a bigger crypt to spend the afterlife in), while commoners simply get a coffin in the ground.

So what geotechnical conditions or concerns would require the construction of an elaborate, communal burial crypt/catacomb instead of simply sticking the dead in coffins and burying them in a normal way? Furthermore, whatever these conditons are need to be able to support a forest or forest-like ecosystem around it for the living to operate in.

Also, this crypt would be built primarily from stone, with rot-resistant timbering (similar to redwood or cedar) available for key tension members -- it needs to be built to last.

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source | link

What geotechnical conditions would force the use of crypts for burial (vs. sticking coffins in the ground)?

I'm working on the layout of a fairly large crypt (for a RPG dungeon), and I want it to be built out of necessity (thus justifying its size, relatively frequent visitation, and egalatarian usage patterns) as opposed to the more typical case where a crypt or tomb will be built for the burial of wealthy folk (with more money yielding a bigger crypt to spend the afterlife in), while commoners simply get a coffin in the ground.

So what geotechnical conditions or concerns would require the construction of an elaborate, communal burial crypt instead of simply sticking the dead in coffins and burying them in a normal way? Furthermore, whatever these conditons are need to be able to support a forest or forest-like ecosystem around it for the living to operate in.

Also, this crypt would be built primarily from stone, with rot-resistant timbering (similar to redwood or cedar) available for key tension members -- it needs to be built to last.