What would the cost be if an Illuminati-type figure arose out of nowhere -- and commissioned a gigantic Gothic Cathedral be built out of pure gold (see details)

As an example, you could try to replicate the Kölner Dom as a pure gold structure.
The building has an estimated mass of about 300000t, and is mostly built with Trachyte, which has a density of 2.78g/cm³, or 2.78t/m³. Accordingly, the building therefore has a stone volume of about 108000m³, and with a density of 19t/m³ for gold, it comes to an amount of gold of about 2.082.733t
The price of gold right now is 47.000€/kg, or 47.000.000€/t.
The material costs for your gold cathedral therefore is about 98 trillion €.

“Elon Musk Claims New Cathedral Is Self-Driving, and Reusable.”

That’s just the gold and stone—@ragingloli—then there’s the craftsmanship!
Then again, that might be incidental to the cost of the gold.

Thanks 98 trillion for the calculations.

Plate the monstrosity in gold leaf. What’s the point in guessing? Where are you going to build it. Do you want to build it in Manhattan with union labor or rural Bolivia with indigent labor? I know this is general, but I swear I sometimes wonder what you folks are smoking that drives these sorts of questions.

That’s okay, @stanleybmanly

We’re a community.

I was thinking, however, a city like Atlanta, GA. Only because I have a picture of the Atlanta skyline and a picture of the Cathedral in Ulm, Germany where the twilight skies look the same.

Atlanta also has a history full of dark secrets and injustices, and has more bedrock to build upon.

There isn’t enough gold in the solar system to build such a thing, which is a relief, as it would look incredibly tacky – assuming it didn’t collapse under its own weight.

Fist of all, it couldn’t be done. There isn’t enough gold unless you could open up the Earth and extract ALL of the gold there is.
ALL of the gold ever mined in the history of man, from last report, would make a block 10’ X 10’ X 100’
(It might be a block about 110’ long by now.)
The weight of such a building probably could not be supported by any foundation. (It is almost 20 times heavier than water.)
Like @flutherother said, it would collapse or greatly distort due to it’s softness. (They add silver to gold to make it harder, like 14K or 18K for teeth.)

Who said the gold would have to come from Earth?

Maybe a few neutron stars colliding could do the trick.
https://www.nasa.gov/image-feature/neutron-stars-create-gold-and-platinum-in-their-wake

In any case, the Anunnaki and Nephilim (and possibly the Fungi from Yugguth / Mi-go) have been mining gold out of Africa for many millennia, using human slave labor— and those mines go several thousands of miles.

Actually, if you consider the mass of the thing, you would probably only get away with erecting it in a place of very low gravity—say in orbit around a solid gold asteroid. That solves the sourcing for materials, as well as the staggering difficulties of transporting anything as heavy as gold. Hell, instead of building the thing, you could simply carve it out of a gold mountain size chunk from the asteroid.

If I had to go to all of the trouble of getting this gold from somewhere out of Earth’s boundaries, I would either tell this “Illuminati-type figure” to get it and build it him/her self, or “kiss my ass.”

Oh it’s obvious that this mythical figure would have the means to either pay or FORCE the construction with indifference. The entire fantasy is of course preposterous. The project and the person undertaking it are just as consistent as the nonsense around the illuminati themselves.

^^^ THAT is VERY TRUE!!!

Howbeit, to most of the rest of you—why not read the details wherein I said that this figure, whomever he might be, was disappointed that it COULDN’T be all gold and had to just be plated or veneered, if you will, in gold? Even so, it took about 12x the amount of gold known to exist in the world, and the fact that these huge amounts were produced is an arcane mystery in itself.

Solid gold? I don’t think you’d find that much gold in the free market. Most of it is held in government reserves (a country’s currency value is dependent on its gold reserves) or as private reserves (ask me about it! I belong to a country which holds 11% gold in the world as household jewels!). Not much of it left in the free market and not much comes out of gold mines nowadays. Even if you hypothetically discover a few new goldmines, all of it automatically goes to the country’s reserves!
Take a look at it from another perspective, logistics of constructing a gold structure. Again, there are very few gold smiths in this world who can hypothetically pull off a build of such magnitude. Make no mistake, you’d need gold smiths for this job and not regular construction workers. Shaping gold is not the same as carving a stone or pouring concrete. That is probably why we don’t have many (ANY) solid gold mega structures in the world. What we have are structures that are Gold plated (Solid constructions covered with Gold sheets), My country has many such ancient structures (which include the two richest temples of the world), where vast areas of constructions are completely covered with gold sheets. The ancient people didn’t attempt to make it entirely out of Gold, barring a few domes because there are very few people capable of making them.