Aetherium
It powers invention, discipline, and a language of control that the trilogy keeps questioning.
Heart of Steam · World atlas
The World
Three cities. Three visions of power.
Aetherholm, Velmira, and Lunaris are more than three backdrops: the machine, the mask, and the tide shape a universe where memory, technology, and responsibility meet.
Setting pillars
What holds the world together
These are the recurring ideas that connect the trilogy even when the cities look and behave very differently.
Memory
In this world memory is not only private feeling. It can be ritualized, archived, and contested.
Transit
Bridges, airships, harbors, and routes matter because the cities are in conversation with one another.
Custody
The Heart of Steam turns every institution into a test of whether care can avoid becoming possession.
The cities
Aetherholm, Velmira, and Lunaris
Each city changes what the Heart of Steam means, because each city has its own public logic of truth and power.
Aetherholm
The city of machines and disciplined invention.
- Academy of Aetherium
- Sealed archives
- Industrial confidence
Velmira
The city of masks, testimony, and public ceremony.
- Memory lanterns
- Diplomatic ritual
- Social interpretation
Lunaris
The harbor city of observatories, tides, and fractured skies.
- Tidal records
- Shifting bridges
- Moon-fractured horizon
IN-WORLD LANDMARKS
Places with a purpose in the story
These locations are drawn from the novels’ glossaries. Their introductions explain the setting without revealing the final outcomes.
Aetherholm
Academy of Aetherium
Lyra’s institute of research, with official laboratories above a network of concealed records and experimental spaces.
Glass Palace
The ceremonial center of the Houses, where political encounters take place amid mirrors and corridors designed for diplomacy.
Mechanical Cathedral
A major ritual structure used to legitimize decisions of the Houses, with a hidden aetheric mechanism behind its solemn appearance.
Velmira
Archive of Quieted Names
An institution where removed names can be preserved, reduced to a function, or pushed aside by ritual and politics.
Low Lanterns
An underground repository for memories that were never publicly celebrated; the lanterns answer when suppressed versions seek witnesses.
Gallery of Ancient Veils
A collection of older veils, reminding visitors that many masks began as protection before becoming instruments of control.
Lunaris
Custodians of the Moons
A ritual order responsible for tides, fragments, domes, and water-memories, divided by conflicting loyalties.
Tide Diary
A record assembled across eras by more than one hand, recording the city’s changing relationship with water and Aetherium.
Black Oyster
A refuge associated with people wounded by the tide, where the value of personal boundaries becomes especially clear.
Note: this is a setting guide, not a geographic chart. The future interactive map will distinguish documented places from positions that the novels do not fix.
Worldbuilding notes
Reading the setting without getting lost
These short essays are here to make the world legible to readers who want more than a sales summary.
How Aetherium shapes the setting
The world is not steampunk only because it has brass and engines. Aetherium gives the setting a moral technology: the ability to organize power, memory, and institutional authority.
Why the cities feel different
Aetherholm values precision, Velmira values interpretation, and Lunaris lives with instability. The trilogy becomes richer because each city teaches the same central problem in a different language.
Witnesses and public truth
From archives to rituals, Heart of Steam treats evidence as something communities fight over. Witnesses matter because no single institution deserves automatic trust.
Beauty with consequences
The world is elegant, but never decorative by accident. Domes, lanterns, observatories, bridges, and masks always reflect what a city believes about order and power.
At a glance
How the three cities differ
Use this as a fast orientation guide before diving back into the books.
| Topic | Aetherholm | Velmira | Lunaris |
|---|---|---|---|
| Atmosphere | Industrial, precise, investigative | Ceremonial, elegant, interpretive | Maritime, lunar, unstable |
| Public symbol | Gears and laboratories | Masks and lanterns | Domes and shifting bridges |
| What it teaches about the Heart | Knowledge can become control. | Memory can be curated by power. | Protection without domination is difficult. |
What next
The useful paths from here
This page is part of a larger structure, not an isolated detour.
Best next page: The Trilogy
Use the reading guide if you want to understand what each book contributes before moving into deeper lore.
Map page planned next
The interactive map will become useful only when the underlying city notes are rich enough. This world page is the foundation for that step.
Heart Archive companion material
The archive adds printable and illustrated extras for readers who already know the trilogy or want the setting in collectible form.
Reader questions
Quick answers about the setting
Do I need this page before reading Book One?
No. The trilogy stands on its own. This page is for readers who want orientation or who enjoy worldbuilding context.
Is this a full lore encyclopedia?
Not yet. It is the first strong setting page, meant to lead toward the future map, houses, and technology pages.
Will the map page come next?
Yes. The interactive map is planned as the next infrastructure-heavy step, built on the material clarified here.
Universe directory
Explore the universe
All nine main sections are ready to explore: Home, Trilogy, Characters, World, Map, Houses & Powers, Aetherium, Timeline and Archives & Lore.
01HomeThe beginningOpen page ↗02The TrilogyThree novels, one continuous storyOpen page ↗03CharactersThe people, bonds and rivalriesOpen page ↗04The WorldWhere machines, masks and tides meetOpen page ↗05Interactive MapExplore the three citiesExplore now ↗06Houses & PowersInstitutions, allegiances and conflictOpen page ↗07Aetherium & TechnologyMachines, memory and the living HeartOpen page ↗08TimelineA reading-safe chronologyOpen page ↗09Archives & LoreRecords, symbols and the world behind the storyOpen page ↗
Heart of Steam
From setting to story.
Now that the world is clearer, return to the trilogy page or go straight to Book One.