Classical Architecture

 Burying utility tunnels deep underground wasn't a mistake; it was an absolute necessity. In places with freezing European winters, pipes must be placed deep below the frost line to prevent them from freezing and bursting.

Building a walk-in stone or brick tunnel meant workers could walk straight in to fix a water pipe or clear a sewage line without tearing up the entire street every single time. It was a vastly superior, long-term solution compared to modern cities constantly jackhammering the asphalt.

 Dropping tons of dusty coal, muddy firewood, or heavy barrels straight from the street into a basement hatch kept the main living quarters clean. If you had to carry 50 sacks of coal through the grand front lobby of a university or a manor house, you would ruin the building in a single winter.

 It is highly practical, space-saving, thermally insulated architecture.

Old cities had a lot of tunnels for practical purposes (including to allow staff to move heavy items or food without being exposed to the elements). 

We had 2 or 3 or 4 and a half half buildings.
2/3/4 full floors. One half stood for the semi basement (with windows to allow natural light in) and the other half was under the roof. By doing this, you gained two extra functional floors without creating an excessively tall building that might violate local height restriction building codes.

The name of the building was ''2 and a half half'' or ''3 and a half half'' 

One half = basement 

the other half = under the roof.

Sometimes these buildings had underground doors that lead into tunnels (not the street, nothing ''sank'' :))))) 

One of the univeristy buildings from Red Deneb had a stunning 2 and a half half structure - with massive underground vaults, restaurants that had large windows (nothing like the other two full stories above). 

The engineering building looked like a massive palace with many wings and its restaurant had amazing food (too bad I did not have the time to eat there, some of the best food in the universe). Interestingly, Green Deneb's first university restaurant also had some of the best food in their world + stunning views + the option to picnic outside in a civilised manner.

Their roads were a dream. Driving felt like flying or hovering above the asphalt - the road was that smooth and perfect. 

Its capital boasted about its achievements and beauty and dubbed itself as ''The City with Everything'' - and yes, it was TRUE. 

Tropical mountains, temperate mountains, river beaches, artificial island that looked natural, stunning river locations with a choo choo train that stopped for passengers to buy some of the best grill and potatoes in the entire universe, then stopped again for the best ice cream :) The sea/ocean was also close.
It wasn't just their perfect geography that allowed you to travel to the most stunning locations within an hour or two (via train or car/bus), it was everything else, too.
Stunning architecture? Check.
Best food + drinks = Oh, yes (this is the ultimate compliment I could offer to any world). 

My favourite car? Check.
Best roads? Check.
Best sound system (Terra does not have it yet, and this was 7kya). Check.
Best music? Of course they have it - they attract the best artists and entertainers from the entire universe (they only care for the best). 

I have yet to think of something that was missing :) Everything was perfect ,except men's behaviour (still much better than Terra). 

NS50 had a stunning museum of history and art. Its underground galleries hosted the grand evil that visited their world - it was an immersion into darkness, with lights that matched the evil energy - red (Ian), green, blue (Freyr had his own very dark blue gallery), yellow, etc. 

Then you exited through a pure white gallery where you had to focus to choose only White Light, then you climbed up into it. It was breathtakingly beautiful. The White Light galleries were free to visit. Children loved them. They could visit the underground hellish galleries, but they received a smile and a silent warning from the staff :) And sometimes a whisper ''Aren't you a bit too young for that?'' yet no one tried to stop the toddlers. They got a free ice cream at the end of their trip to hell :)

The stairs that went underground were dark and squeaky - this was part of the general atmosphere created around evil and its manifestations. 

The White Light Hall that welcomed you after the trip to hell had a stunning white marble staircase. The steps were not white (never trample white - the symbol of White Light). You climbed up into White Light and the energy was real and highly concentrated there to help traumatised people calm down.

The immersion into darkness was a powerful lesson on how to recognise it and its manifestations, so that you could successfully fight it and set yourself free from it.